Tyler Colvin entered spring training as a mid-range prospect looking to land a spot on the Chicago Cubs’ bench. But the 24-year-old has done far more than simply make the roster. Roaming all three outfield spots while spotting for Alfonso Soriano, Marlon Byrd and Kosuke Fukudome, Colvin’s bat has been +4.9 runs above average, and he has jacked 13 HR in 230 plate appearances. Is the Clemson product someone to target in keeper leagues, or his he playing over his head?

The Cubs selected Colvin with the 13th overall pick in the 2006 draft. At the time, the pick was considered a reach by Baseball America. Here’s what BA said about him at the time:

Colvin doesn’t have a tool that stands out, but as he has gained strength he has been able to repeat his smooth lefthanded swing more readily, and he’s added power to be average in that department. He’s an above-average runner and an efficient basestealer who plays a solid left field….some scouts estimated he would go in the first three rounds.

The 6-foot-3 lefty batter made his professional debut in the Short-Season Northwest League in ’06, batting .268/.313/.483 in 288 PA. In a sign of things to come, Colvin showed good power (.215 Isolated Power) and rough strike zone control (5.9 BB%, 20.8 K%). BA noted that he was young for a college draftee (turning 21 at the end of the season) and had projection in his lean 190 pound frame. They did caution that he needed to “tighten his strike zone and lay off high fastballs.”

In 2007, Colvin divided his time between the High-A Florida State League and the Double-A Southern League. In the FSL, he hit .306/.336/.514 in 262 PA. Colvin again hit the ball hard (.208 ISO) and didn’t whiff all that often (19.2 K%), but his plate discipline was a concern — he walked just 3.8% of the time. Upon the promotion to Double-A, the hacking heightened. Colvin drew ball four 1.9% and punched out 21.9%, putting up a .291/.313/.462 triple slash and a .170 ISO. The power was a plus, but the Francouer-sized strike zone scared scouts. “Advanced pitchers,” Baseball America predicted, “will exploit his anxiousness.”

Chicago sent Colvin back to the Smokies in 2008, and he made some modest gains in laying off junk pitches. In 602 PA, he slashed .256/.312/.424, walking 7.3%, striking out 18.7% and posting a .169 ISO. The main reason for the drop in his numbers was his BABIP — after having 34-35 percent of his balls in play fall for hits in ’07, Colvin had a .286 BABIP in ’08. BA commented that he sometimes cut himself off in his swing and “employ[ed] a dead-pull approach.” He seemed to have a timing issue at the dish, as his infield fly rate spiked — according to Minor League Splits, Colvin popped the ball up 14% in 2006 and 12.3% in 2007, but that figure rose to 20.3% during his second tour of the Southern League. A sore left elbow probably didn’t help matters any, either. Colvin underwent Tommy John surgery during the off-season.

Sent back to the FSL to begin the 2009 season, Colvin hit just .250/.326/.357 in 129 PA while testing out his surgically-repaired elbow. He walked 10.1%, with a 24.1 K% and a .107 ISO. Bumped up to Double-A in late May, he resumed his high-power, low patience act — he put up a .300/.334/.524 line with a .225 ISO, while working a walk just 4.8% and striking out 18.6%. Colvin’s pop up rate fell back to 13.7% between to the levels, with BA saying he “did a better job of covering the plate, as it no longer hurt when he torqued his elbow extending his arms to hit pitches on the outer half.” Colvin even got a brief glimpse of the majors in September when the Cubs suspended Milton Bradley.

Colvin’s work in the big leagues this year offers both promise and concern. On the positive side, he’s creaming pitchers — Colvin’s got a .252 ISO, and 24.1% of the fly balls that he has hit have left the yard. All of that thunder has helped him post a .262/.314/.514 line and a .357 wOBA.

However, he’s still greatly expanding his zone. Colvin has chased 39.2% of pitches thrown off the plate, one of the 20 highest rates among batters with 230+ PA and well above the 28.8% MLB average this season. He’s also making contact 70.3% of the time, compared to the 81% MLB average. The hacking and whiffing has led to a 6.5% walk rate and a 29.5% K rate.

Colvin has been an asset at the plate while hitting for gargantuan power, and he has shown the ability to hit for solid pop in the minors. But is it really reasonable to expect a guy with a career .188 ISO on the farm to continue posting a major league ISO on par with elite major league sluggers? While Colvin should continue to drive the ball often, we should expect a good deal of regression — ZiPS projects a .168 ISO for the rest of the season, and CHONE predicts a .186 ISO.

Long-term, Colvin should hit for above-average power. But if he’s going to hold significant value to the Cubs and fantasy owners, he’s going to resist the temptation to lunge at those off-the-plate offerings.

Erik Kratz, Pirates (Owned in 0% of Yahoo leagues)

With Ryan Doumit looking lost behind the plate and the since-demoted Jason Jaramillo trotting down the first base line less often than Jalapeno Hannah, the Pirates decided to call up the 30-year-old Kratz.

A monster of a man at 6-foot-4 and 255 pounds, Kratz is a former 29th-round pick from the Toronto Blue Jays’ organization who latched on with the Pirates as a minor league free agent prior to the 2009 season. The right-handed hitter posted a .273/.337/.470 line in 353 Triple-A PA last season, and he batted .296/.396/.550 in 225 trips to the plate in 2010 before getting the big league promotion.

It’s hard to say how much the organizational soldier will play, but he’s expected to garner more starts than Jaramillo did and caddy for the switch-hitting Doumit against lefties. During his career, Doumit has a .342 wOBA as a lefty versus RHP and a .309 wOBA against left-handers as a RHB. Using the method outlined here for estimating platoon skill, I get a .346 estimated wOBA for Doumit vs. RHP and a .322 estimated wOBA against lefties. Can Kratz match that? Overall, CHONE projects Kratz as a slightly below-average MLB hitter (.253/.318/.443, roughly a .322 wOBA). Assuming he shows a typical platoon split for a RHB (better against LHP), Kratz should be a bit of an upgrade over Doumit against lefties.

Depending upon the Pirates’ level of disgust in Doumit’s D, Kratz could get penciled into the lineup more frequently. He’s got some power, and that could make him an option in NL-only leagues.

Drew Stubbs, Reds (34%)

Cincy’s first-round pick in the 2006 draft is easing concerns that his bat won’t play well at the big league level. A 6-4, 205 pound center fielder known for wheels allowing him to cover lots of ground and swipe bases at a high percentage clip (77.1% in the minors), Stubbs never really stand out at the plate as a prospect. He hit a collective .269/.364/.401 in 1,847 plate appearances, with a good eye (11.9 BB%) but little in the way of pop (.132 ISO). Stubbs also whiffed 27.3% of the time, raising questions about his contact ability.

The former Longhorn’s defensive chops figured to make him an acceptable starter even if his offense was below-average, but happily, he’s holding his own with the lumber. In 546 major league PA over the past two years, Stubbs has a .257/.322/.434 line and a .337 wOBA. Sure, he’s coming up empty more than most — his contact rate is 73.4% (81% MLB average) and his K rate is 29.3% — but that hasn’t precluded him from succeeding. Stubbs has walked an acceptable 8.4% of the time, and he’s hitting with the authority that once led Baseball America to claim he possessed “plus raw power.” Stubbs has a .177 ISO in the majors, with 21 homers. He’s also contributing plenty on the base paths. After going 10-for-14 in SB attempts last season, Stubbs has been successful in 18 of 21 tries in 2010.

Given Stubbs’ mild numbers in the minors, both ZiPS (.240/.311/.378 rest-of-season projection) and CHONE (.246/.323/.379) are skeptical that the 25-year-old can keep up the pace. Personally, I think he’s capable of hitting at a level closer to his current mark. He’s not a hacker, he’s tapping into his power potential and he’s taking his home swings in a park that increases HR production by 35 percent for righty batters.

Last winter, we took a gander at the MLB hitters with the biggest difference between their respective batting average on balls in play (BABIP) and expected BABIP (xBABIP) totals. Today, let’s update those lists for 2010.

To get the full methodology, here’s a link back to last year’s article. xBABIP, developed by Peter Bendix and Chris Dutton, estimates a hitter’s BABIP based on components such as batted ball distribution, speed and power. For the purposes of calculating xBABIP, I’m again using a formula developed by Slash 12 of Beyond the Box score based on the work of Bendix and Dutton. The model uses the following to find a hitter’s xBABIP:

– Line Drive Percentage (LD%)
– Ground Ball Percentage (GB%)
– Fly Ball Percentage (FB%)
– Infield/Fly Ball Percentage (IFFB%)
– Home Run/Fly Ball Percentage (HR/FB%)
– Infield Hit Percentage (IFH%)

Hitters with high LD%, HR/FB% and INFH% totals tend to have higher BABIPs than those who don’t. Grounders have a higher BABIP than fly balls, and infield flies are BABIP killers.

From last year’s post, a disclaimer:

These lists of “lucky” and “unlucky” hitters are based on just one year of data. To get a better feel for how a hitter will perform in the future, it’s vital to take a good hard look at multiple seasons worth of performance. This is just a quick-and-dirty exercise.

In this case, the numbers are based on even less data — I used a 200 plate appearance cut-off. These lists basically tell you, “who has underperformed or over performed based on their batted ball inputs so far in 2010?” A player might have certain line drive, infield fly and HR/FB percentages to this point, but that does not mean those numbers will persist in the months to come. To provide more context, I have included the rest-of-season ZiPS BABIP for the players with the biggest BABIP/xBABIP splits.

Without further ado, here are the 25 hitters with the biggest negative BABIP/xBABIP splits. These guys have BABIP totals that are significantly lower than their xBABIPs:

Read the rest of this entry »

Right-hander Chris Tillman is expected to play a prominent role in the Baltimore Orioles’ attempt to climb from the depths of the AL East standings. The 22-year-old, picked up as part of the February 2008 Erik Bedard deal with the Seattle Mariners, has both the performance record and scouting reports to elicit the attention of fantasy owners everywhere. Yet, Tillman’s early turns in the big league rotation over the 2009 and 2010 seasons have been underwhelming — with a 5.24 xFIP in 90 innings pitched, he has been slightly worse than replacement-level. Why has Tillman scuffled so far, and what can be expected in the future? Let’s try to find out.

First, I’d like to point out that the MLB numbers to be referenced have occurred in 90 innings, spread over two seasons. It’s a woefully inadequate sample with which to make any sort of bold claim. I’m simply trying to explore why Tillman has performed poorly to this point. The fact that he hasn’t zoomed out of the gate doesn’t preclude him from becoming a quality starter down the line.

With that disclaimer out of the way, here’s a look at how Tillman’s major league peripheral stats match up with his Major League Equivalent (MLE) line, based on his pitching in the minors over the past two seasons. In other words, here’s how Tillman has pitched in the majors, compared to how we would have expected him to pitch based on his minor league stats:

Actual MLB: 5.1 K/9, 3.7 BB/9, 1.80 HR/9, 5.24 xFIP
2009-2010 MLE (based on 176 IP with the Triple-A Norfolk Tides): 6.57 K/9, 2.89 BB/9, 0.95 HR/9, 4.31 FIP

Tillman has punched out about 1.5 less batters per nine innings than his MLE suggests. The lack of whiffs is reflected in his plate discipline stats — opponents have made contact against Tillman 84.9% of the time they take a cut (81% MLB average). Tillman’s swinging strike rate is 6.2%, while the big league average sits between eight and nine percent.

Looking at his Pitch F/X data, he has garnered a below average number of whiffs with his 91-92 MPH fastball (reputed to be 94+ MPH in the past) and upper-70’s curveball. Tillman’s heater has been whiffed at 4.6% (6% MLB average), and his curve 6.8% (11.6%). His 79-80 MPH change has a 13.9% whiff rate, which bests the 12.6% MLB average.

Tillman’s walk rate is higher than expected, due at least in part to his getting behind the hitter right from the get-go. Tillman’s first pitch strike percentage in the bigs is 54.5%, compared to the 58% MLB average. According to Baseball-Reference, batters have gotten ahead in the count at some point in 38.1% of their plate appearances versus Tillman. The AL average, by contrast, is 35-36 percent. Tillman has been ahead in the count at some point in 24.8% of opponent plate appearances, while the AL average is 30-31%. He’s spending too much time in hitter’s counts and too little time in pitcher’s counts, which obviously influences both his punch out and walk numbers.

Going back to the Pitch F/X data, Tillman’s throwing lots of strikes with his fastball — 66.1%, compared to the 64% MLB average. But, our Pitch Type Run Values suggest hitters are slamming the offering. Tillman’s fastball has been -1.65 runs below average per 100 pitches. He’s not throwing his curve or changeup for strikes — 50.7% for the deuce (58% MLB average) and 57.4% for the change (60.7%). But those secondary pitches fare better in terms of run value (-0.09 for the curve, +0.43 for the change).

Homers have also been an issue. Tillman has coughed up 1.8 dingers per nine. His home run per fly ball rate is inflated, at 14.1% (the MLB average is about 11%). However, Camden Yards increased home runs per fly ball hit by 15 percent over the 2006-2009 seasons. And, Tillman gives up lots of fly balls — his GB% in the majors is just 38.1%, and it was 37.6% in Triple-A over the past two seasons. If he had given up home runs per fly ball hit at a league average rate (11%) on the road and about 13% at home, he would have been taken deep 16 times so far (1.6 HR/9), instead of 18. Given Tillman’s flyballing ways, he’s not a great fit for his home venue. Perhaps that’s part of the reason why he has been working on a two-seam fastball, an offering that generates more ground balls than any other pitch type.

Fantasy owners, particularly those in keeper leagues, should have patience with Tillman. He won’t turn 23 until next April, and he was considered a top 25 prospect by Baseball America as recently as last season. That being said, there are some concerns here — Tillman’s strikeout rate fell at Norfolk this season, his fastball velocity has been less than advertised and hitters often loft the ball against him, a negative considering his home ball park. In the present moment, expect adequacy instead of excellence — ZiPS projects 6.11 K/9, 3.21 BB/9, 1.29 HR/9 and a 4.69 FIP for the rest of 2010, while CHONE forecasts 6.14 K/9, 3.6 BB/9, 1.37 HR/9 and a 4.68 neutralized ERA.

Right now, Tillman isn’t showcasing the electric stuff that earned him the adulation of scouts. But keeper league players are best off holding tight and hoping that the mid-90’s heat and hammer curve return. Those just playing for the here and now should recognize Tillman’s lack of polish, while keeping a close eye on his outings. Pitchers don’t necessarily develop in a linear fashion; if he’s not hurt, perhaps Tillman’s just a mechanical tweak away from returning to form.

Overall, the Minnesota Twins’ starting rotation has been excellent — the team boasts a 4.01 xFIP from its starters, best in the AL. But, while Francisco Liriano is re-establishing himself as an ace and Carl Pavano is thriving on the power of the ‘stache, the rest of the rotation is unsettled at the moment. Scott Baker has been hampered by poor outfield D, but he’s dealing with elbow tendinitis. Kevin Slowey’s vanishing ground ball rate has contributed to a so-so-season. Nick Blackburn, meanwhile, has seen his K rate enter untenable territory.

As such, the Twins are considering moving Brian Duensing back into the starting rotation, likely at the expense of Blackburn. If Duensing does make the shift from the ‘pen, what’s his fantasy value? Let’s take a closer look at the 27-year-old lefty.

Duensing was selected out of Nebraska in the third round of the 2005 draft. A 5-foot-11, 195 pound Tommy John survivor, Duensing was drafted more for his polish and proximity to the majors than for his stuff — Baseball America said he sat 86-90 MPH with his fastball and possessed a solid changeup. BA also voiced concern about the Cornhusker’s durability, as he had to miss the Big 12 Conference tournament due to lingering elbow soreness.

After carving up less experienced hitters in Rookie ball that summer (50.1 IP, 9.8 K/9, 2.9 BB/9, 3.27 FIP), Duensing made his full-season debut in 2006. He jumped all the way from the Low-A Midwest League to the Double-A Eastern League, with a stop in the High-A Florida State league in between. In 160 combined innings, Duensing had 6.6 K/9, 2.2 BB/9, and 0.7 HR/9. According to Minor League Splits, his ground ball rate was 51.8% and his park-and-luck-adjusted FIP checked in at 3.87. After declining to include Duensing in its ’06 Prospect Handbook, BA rated him as the 18th-best talent in the Twins’ system prior to 2007. While noting that nothing in Duensing’s repertoire amazed scouts, BA claimed that “all his offerings — both two-and-four-seam fastballs that sit in the upper 80’s, a curveball, slider and circle changeup — grade out as average or a tick above at times.”

The next year, Duensing split the season between Double-A and the Triple-A International League, spending the majority of his time at the latter level. He whiffed 6.7 per nine innings, walked two per nine and gave up 0.8 HR/9 in 167.1 IP. Duensing got grounders 48.2% of the time while posting a 3.56 adjusted FIP. Baseball America bumped him up to eighth in Minnesota’s system, again lauding his four-pitch mix and quality control.

Duensing’s stock slipped a bit in 2008, as his strikeout rate took a tumble back at Rochester. He punched out five batters per nine innings, handing out 2.2 BB/9 and coughing up a homer per nine frames. Duensing continued to keep the ball down (51.7 GB%), but his adjusted FIP fell to 4.13. BA dropped him to number 16 on the Twins’ top 30 list, wondering if a move to relief might be in his future — Duensing reportedly sat 94 MPH with his fastball out of the ‘pen for the U.S. Olympic team in Beijing.

In 2009, Duensing divided his time between the Red Wings and the Twins. He had 5.3 K/9, 2.3 BB/9, 0.2 HR/9 and a 46.2 GB% in 75.1 minor league innings. Adjusting for that tiny homer rate, Duensing’s FIP was 3.89. As a Twinkie, Duensing made nine starts and 15 relief appearances. He posted a 4.42 xFIP in 52.2 IP as a rotation member (his actual ERA was 2.72), with 5.64 K/9, 2.56 BB/9 and a 46.3% ground ball rate. Duensing had 5.74 K/9, 4.6 BB/9, a 44.2 GB% and a 5.36 xFIP in 31.1 innings as a reliever. His pitch selection between to two roles wasn’t especially different (he incorporated his curve more as a starter), nor was his fastball velocity (90.5 MPH out of the ‘pen, 91.3 MPH as a starter).

This season, Duensing has pitched exclusively in relief. The surface results look spectacular — a 1.67 ERA in 43 innings. His peripherals, by contrast, aren’t so special. Duensing’s got 5.65 K/9, 2.51 BB/9, a 49.6 GB% and a 4.24 xFIP. That svelte ERA is due in large part to a .241 BABIP and a 91.1% rate of stranding runners on base.

For the rest of 2010, ZiPS projects 4.83 K/9, 3 BB/9, 1.17 HR/9 and a 4.73 FIP from Duensing. That forecast comes in a swing role, so his projected FIP would be higher solely as a starter. CHONE has a more optimistic projection — 4.92 K/9, 2.81 BB/9, 1.03 HR/9 and a 4.59 neutralized ERA as a full-time starting pitcher. That’s basically the extent of Duensing’s utility — he could be an average big league starter. There’s nothing wrong with that from the Twins’ standpoint, as a passable rotation arm yet to reach arbitration has value. But fantasy owners shouldn’t get overly giddy about Duensing.

Any efforts on the part of the Cleveland Indians to trade closer Kerry Wood got a little more difficult on Saturday, as the 33-year-old was placed on the DL with a finger blister. It’s the second time Wood has been sidelined this season, as the erstwhile Cub was shelved until early May with a strained right lat muscle in his back.

Since signing a two-year deal with the Tribe prior to 2009, Wood has earned around 15-$16 million while contributing 0.2 Wins Above Replacement. He was lights-out during his last season in Chicago (11.4 K/9, 2.44 BB/9, 3.07 xFIP, 2.2 WAR), but Wood’s control has been mediocre in Cleveland — he’s got 9.7 K/9, 4.7 BB/9 and a 4.36 xFIP in 75 innings since transitioning to the AL.

There’s still a chance that he gets traded — Wood could be back before the July 31st deadline, and there’s always the possibility of an August waiver deal. If Wood passes through waivers unclaimed in August, the Indians would be free to trade him to any club. If Wood gets claimed, Cleveland could: A.) revoke the waiver request, B.) make a deal within two business days with the club making the claim or they could C.) let the claiming team take Wood and his salary for a twenty grand fee (thanks, Cots Baseball Contracts and MLBTradeRumors).

With Wood out, Chris Perez is expected to take what save chances the Indians get. The former Hurricane, picked up from the St. Louis Cardinals (along with RHP Jess Todd) in the July 2009 Mark DeRosa deal, is available in nearly four-fifths of Yahoo leagues. Perez’s gleaming ERA and past as a top 100 prospect might lead some to think he’s breaking out in a big way, but the 25-year-old righty remains a work in progress.

In the minors, Perez used his mid-90’s fastball and low-to-mid-80’s slider to rack up 12 strikeouts per nine innings. However, he also issued a whopping six walks per nine frames, leaving him with a good-not-great 3.86 FIP in 113.1 IP. The story has been much the same in 133 big league innings over the 2008-2010 seasons — Perez has punched out over a batter per inning (9.41 K/9), but he has handed out a free pass every other frame (4.53 BB/9). He has also been a fly ball-centric pitcher, getting grounders just 35.7% of the time and serving up 1.15 HR/9. Overall, Perez has a 4.44 FIP and a 4.38 xFIP, a performance that has been exactly replacement-level.

That’s not to say that Perez won’t fare better in the future, but his current 2.62 ERA is based mostly on a .236 BABIP, as opposed to some marked improvement on his part. Perez gets ninth inning responsibilities for now, and he could keep them if Wood is swapped before July 31st or in a later August deal. But, without a change in Perez’s peripheral stats, decline is likely — ZiPS projects 9.64 K/9, 4.82 BB/9, 1.29 HR/9 and a 4.44 FIP for the rest of 2010.

Coco Crisp, Athletics (Owned in 8% of Yahoo leagues)

For Covelli Loyce Crisp to be relevant in fantasy circles, he does have to, you know, stay on the field. That has been a problem in recent years — the former Indian, Red Sock and Royal was limited to 215 plate appearances last season because of surgery to repair a torn labrum in his shoulder, and he was shelved this season until late May after fracturing his left pinky finger. Then, Crisp strained his right intercostal muscle, costing him another month’s worth of games. Recently, he has been battling a sore left hamstring .

While durability is a serious issue, Crisp does have something to offer owners. The 30-year-old has .372 wOBA in a very small sample (81 PA), with five stolen bases in six tries. Both his ZiPS (.250/.321/.400) and CHONE (.270/.345/.400) projections suggest he’s capable of being adequate offensively, and Crisp still possesses the speed to make some noise once he gets on base. He’s unreliable, but he can help out in the SB department without making outs at a Willy Taveras-like clip.

Brett Myers, Astros (22%)

Myers endured a disastrous 2009 season, missing a big chunk of time following right hip surgery in June and then straining his shoulder upon returning in September. His peripherals weren’t terrible in ten starts and eight relief appearances (6.37 K/9, 2.93 BB/9, 4.32 xFIP), but Myers coughed up a mind-boggling 2.29 homers per nine innings — 23.4% of the time a batter hit a fly ball against him, it left the yard. Philly’s 1999 first-rounder had long posted lofty HR/FB rates (15.5% prior to 2010, compared to the 11% MLB average), but that ’09 rate was absurdly high.

Over the winter, the Astros inked Myers to a one-year, $5.1 million deal with a mutual option for the 2011 season. The 29-year-old righty has already earned that cash, and then some — with 2.2 WAR, Myers’ performance has been worth $8.7 million. He has gone to his breaking stuff (a mid-80’s slider and a high-70’s curve) even more than usual this season, and that game plan appears to be working — according to Pitch F/X data from TexasLeaguers, Myers is throwing his slider for a strike 67.9% of the time (63.5% MLB average), and his curve is getting strikes 62.6% (58% MLB average).

He’s got 6.49 K/9, 2.72 BB/9 and an xFIP of exactly four in 129 innings. That HR/FB figure has plunged to 8.3%. That’s likely going to rise, and with it, so will Myers’ 3.35 ERA. But he’s capable of remaining an above-average starter. CHONE (4.60 neutralized ERA for the rest of the season) is skeptical, but ZiPS projects a 4.25 FIP. I’d lean more toward the latter projection.

A sour season for Matt Wieters owners got even more frustrating on Friday, as the switch-hitting would-be savior was placed on the DL (retroactive to July 10th) with a strained right hamstring. Wieters has been battling the bad hammy since tripping while rounding second base during a July 9th game against the Texas Rangers.

The fifth overall pick in the ’07 draft laid waste to minor league pitching in 2008 (a combined .355/.454/.600 between High-A and Double-A) and 2009 (.305/.387/.504 in Triple-A) before the O’s called him up last May. Wieters turned in a very impressive rookie season — while not reaching the hyperbolic expectations set by some, he hit .288/.340/.412 with a .331 wOBA in 385 plate appearances. League-average offense from 23-year-old backstop in the AL East is nothing to scoff at.

Wieters was supposed to take several steps forward in 2010, with both ZiPS (.282/.346/.427, .342 wOBA) and CHONE (.289/.355/.460, .356 wOBA) predicting improvement at the plate. Instead, the former Georgia Tech star has stung those who used a prime draft pick on him — Wieters holds a sluggish .245/.315/.357 line in 298 PA, with a .298 wOBA.

While Baseball America lauded the 6-5, 230 pound Wieters’ 30-homer potential, that pop has not yet been on display in the majors. He had a .124 ISO last season, and that mark has fallen slightly in 2010, to .112. For comparison, ZiPS projected a .145 ISO and CHONE had a .171 ISO.

Part of the problem is an increase in ground balls hit. Wieters hit grounders 41.9% in 2009, and that ground ball rate has climbed to 46.4% this year. It also doesn’t help that the quality of pitches that he’s swinging at has declined. Here are Wieters’ swing rates on pitches thrown outside of the strike zone (O-Swing) and within the zone (Z-Swing) in 2009 and 2010. I also included Wieters’ O-Swing and Z-Swing rates as a proportion of the MLB average:

Wieters is chasing a slightly higher percentage of pitches thrown off the plate (relative to the MLB average), but the big change is his swing rate on pitches over the plate. He’s taking more offerings thrown within the zone, which has contributed to his getting behind in the count more often. Wieters’ first pitch strike percentage was 53 last season, but it has climbed to 60.7% in 2010 (58-59% MLB average). According to StatCorner, Wieters took a pitch for a strike 29.5% of the time in ’09. This year, he’s taking a pitch for a strike 33.8% (31% MLB average).

Our Pitch Type Run Values suggest that Wieters is struggling on a per-pitch basis against fastballs — his runs/100 value against the heat is -0.49 this season, compared to +0.71 in 2009. According to Pitch F/X data from TexasLeaguers.com, Wieters swung at 45.8% of fastballs seen in ’09, and 41.3% in 2010. When Wieters got a fastball on the first pitch of an at-bat in 2009, his strike percentage was 54.4. This season, he’s got a 62.2 strike% when a pitcher throws him a fastball to begin an AB. It seems as though he’s having a hard time distinguishing balls from strikes against the gas.

Despite his struggles, Wieters is still one of the most valuable properties in the game. ZiPS has a .274/.343/.407 rest-of-season projection for him, and CHONE predicts a .276/.341/.431 line. Even if the power doesn’t manifest when he returns, Wieters isn’t a sub-.250 hitter. His .317 expected BABIP is 26 points higher than his actual .291 BABIP.

I can’t stress this enough — please, please do not trade this guy for fifty cents on the dollar right now. That goes ten-fold for keeper leagues — you’ll be kicking yourself later if you let the aggravation caused by Wieters’ tepid 2010 overshadow his superb track record and prospect pedigree.

The Los Angeles Dodgers are expected to recall right-hander James McDonald from Triple-A Albuquerque sometime over the next few days. McDonald, who was scratched from his scheduled Sunday start for the Isotopes, will likely take on the San Francisco Giants Monday night. The 24 year-old is stuck in between career stages — he’s got too much experience with the Dodgers to qualify as a prospect, but he has yet to establish himself in the majors, either. What’s his fantasy value? Let’s try to find out.

A two-way standout at Long Beach Poly High, McDonald was a draft-and-follow selection in the 11th round of the 2002 draft. L.A. opened up the check book after being impressed with his performance at Golden West (California) Junior College, handing the 6-5, 195 pound pitcher/outfielder a $150,000 bonus. McDonald began his pro career as a starting pitcher in 2003 (8.7 K/9, 2.8 BB/9 and a 3.33 ERA in 48.2 Rookie Level innings), but a bout of elbow tendinitis led the Dodgers to try him out as a position player. The results were disastrous — the lefty-hitting McDonald put up a sub-.600 OPS between the Rookie-Level Gulf Coast and Pioneer Leagues in 2004 and 2005. Convinced that McDonald couldn’t hit the heat, the Dodgers let him resume throwing it.

McDonald returned to the mound full-time in 2006 with a solid performance in the Low-A South Atlantic League. He struck out over a batter per inning (9.23 K/9), though his control was spotty at times (4.11 BB/9). Darnell McDonald’s cousin had a 4.00 park-and-luck adjusted FIP in 142.1 innings. James wasn’t back on the scouting radar, though, as he didn’t make Baseball America’s list of the Dodgers’ top 30 prospects following the ’06 season.

In 2007, McDonald emphatically announced his presence as a prospect. He dominated in 134.2 combined innings in the High-A California and Double-A Southern Leagues, posting rates of 11.2 K/9, 2.5 BB/9, 0.9 HR/9 and a park-and-luck-adjusted FIP of 3.49. About the only concern was his ground ball rate — it fell from 43.9% in ’06 to 38.6% in ’07 — but that’s nit-picking when a guy pitches so well. Utilizing an 87-93 MPH fastball and a pair of quality secondary pitches (a mid-70’s curveball and a high-70’s changeup), McDonald climbed to number seven on L.A.’s prospect list. Saying that McDonald could be a future number three starter, BA praised his “above-average command of three average to plus offerings.”

Beginning to 2008 campaign back in the Southern League, McDonald punched out 8.6 hitters per nine frames, issued 3.5 BB/9 and gave up 0.9 HR/9. With his rate of grounders again declining (35 GB%), his adjusted FIP in 118.2 innings was 4.03. McDonald got bumped up to the Triple-A Pacific Coast League in August, but his stay there wouldn’t be long. After punishing PCL hitters with a 28/7 K/BB ratio and a 3.85 adjusted FIP in 22.1 innings (31.6 GB%), McDonald earned a big league call-up in September. He pitched in relief for the Dodgers, and he even got some postseason action — McDonald whiffed seven Phillies batters in 5.1 scoreless frames during the NLCS. After the season, BA boosted him to number two on the Dodgers’ prospect list.

The Dodgers had McDonald open 2009 in the big league rotation, but the club pulled the plug after a few shaky outings. He was shifted to the ‘pen for a while, but was then sent back to Triple-A to get stretched out. McDonald put up a 3.25 adjusted FIP in 30.1 IP for the Isotopes, with a 40/14 K/BB and a 25 GB%. But, when L.A. recalled him in late June, it was as a reliever. McDonald would go on to log 63 innings in the majors, striking out 7.71 per nine, walking 4.86 and surrendering 0.86 HR/9. With a neutral ground ball rate (44.3 GB%), McDonald had a 4.78 xFIP.

This season, McDonald missed time with a broken fingernail and a strained right hamstring. When on the mound for Albuquerque, he has compiled rates of 8.1 K/9, 3.4 BB/9, 0.6 HR/9 and a 4.39 adjusted FIP in 63.1 IP. McDonald has kept the ball on the ground more this year, with a 43.4 percent ground ball rate.

What can we expect in the majors, should he stick at the back of the Dodgers’ rotation? Prior to the 2010 season, ZiPS projected 7.44 K/9, 4 BB/9, 1.29 HR/9 and a 4.74 FIP for McDonald (CHONE’s forecast came as a reliever). At this point, he looks more like a league-average starter long-term, as opposed to a high-upside arm. McDonald’s curve and change allow him to miss an above-average number of bats, but his control is just so-so and his fly ball tendencies are somewhat worrisome, particularly in the present moment given the Dodgers’ lumbering outfield alignment — the team has the worst collective outfield UZR in the game.

McDonald’s an option in NL-only formats, though Manny, Kemp and Ethier likely won’t do him any favors. As for keeper leagues, he doesn’t really possess the sort of upside to make him a prime target.

Aaron Cunningham, Padres (Owned in 1% of Yahoo leagues)

Cunningham, 24, has been traded as many times (three) as he has gone deep in the major leagues. The Chicago White Sox originally picked the righty batter in the 6th round of the 2005 draft, but swapped him to the Arizona Diamondbacks for INF Danny Richar in June of 2007. The D-Backs then traded Cunningham to the Oakland A’s (along with LHPs Brett Anderson, Greg Smith and Dana Eveland, OF Carlos Gonzalez and 1B/DH Chris Carter) for RHPs Dan Haren and Connor Robertson in December of ’07. This past winter, Oakland sent him to San Diego (with OF Scott Hairston) for 3B Kevin Kouzmanoff and INF Eric Sogard.

That lengthy transaction history tells you two things about Cunningham — he’s a potentially useful player, but his talents aren’t so great as to make parting with him unbearable. His career minor league line is .304/.376/.484 in 2,300+ PA, including .296/.366/.475 in 667 PA at the Triple-A level. In the PCL, Cunningham has shown decent power (.179 ISO), but his strike-zone control hasn’t been especially sharp (8.8 BB%, 23.1 K%). Hot start with the Padres aside, his major league projections are tepid — .240/.298/.371 for the rest of 2010 according to ZiPS, and .257/.322/.413 per CHONE. Cunningham has been filling in for Will Venable (on the DL with a back injury), and his strong showing in a few weeks’ worth of games might excite some. But he looks like a fringe starter — the sort of player with whom teams play roster hot potato.

Cliff Pennington, Athletics (17%)

The 2010 season is Pennington’s chance to prove he’s capable of more than merely keeping the shortstop spot warm until Grant Green’s big league-ready. A first-round pick out of Texas A&M in 2005, Pennington pieced together a .263/.362/.358 line in nearly 2,200 minor league plate appearances. The switch-hitter displayed superb plate discipline (13.2 BB%) and he stole bases at a high-percentage clip (83.6%), but his lack of thump (.095 ISO) led to fears that he’d get the bat knocked out of his hands at the highest level.

So far, that hasn’t happened — Pennington’s got a career .325 wOBA and a 101 wRC+ in 672 big league PA. This season, the 26-year-old’s batting .264/.333/.392 and walking 9.4% of the time. Pennington will never be a power threat, but his .128 ISO is respectable. He has also nabbed 13 bags in 15 attempts, so he’s adding value once he reaches base. For the rest of 2010, ZiPS projects a .260/.331/.362 line. CHONE is less optimistic, at .246/.328/.344.

It’s probably too early to comment on Pennington’s defensive prowess, as he rates poorly by UZR (-7.5 runs per 150 defensive games during his career) and about average according to Total Zone. He might slide over to second long-term, where he’d still have to compete with Jemile Weeks (if Weeks can stay healthy), among others. But for now, Pennington’s good eye and speed make him an option in AL-only leagues.