Stock Watch: 9/15

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Chris Coghlan, Marlins

Talk about a seamless transition to the majors. Often lost in the imposing shadows of top-tier prospects like Cameron Maybin, Mike Stanton and Logan Morrison, Coghlan has posted a robust .365 wOBA with the Fish in 2009.

The 2006 supplemental first-rounder out of Mississippi displayed exceptional control of the strike zone in the minors (11.8 BB%, 11.3 K%), and that firm grasp of the zone has been on display during Coghlan’s rookie year. The 24 year-old has walked 10.5% of the time while whiffing 16.6%, offering at just 20% of pitches thrown off the plate (25% MLB average).

Primarily a second baseman in the minor leagues, Coghlan has not made an especially smooth shift to left field (-13.8 UZR/150). It remains to be seen where he lines up in the long term (will Florida hold on to Dan Uggla?), but his bat is about as polished possible for a rookie.

Brad Penny, Giants

While in Boston, Penny was drubbed for a 5.61 ERA. However, his Fielding Independent ERA (FIP) of 4.48 suggested that he was basically a league-average starter. Penny punched out 6.08 batters per nine frames with the Red Sox, while issuing 2.87 BB/9. His BABIP was a lofty .336.

Since signing with San Francisco, the 31 year-old righty has allowed 4 runs in 22 IP, punching out 10 and walking four. Penny is neither the punching bag that his Boston stint would suggest, nor is he suddenly an ace with the Giants. He’s a quality mid-rotation option.

Boston possesses decision-makers far smarter than I. But, it’s hard not to feel as through the normally thorough, pragmatic organization made a couple of knee-jerk reactions in discarding Penny and John Smoltz.

That’s not hindsight bias; there were indicators suggesting that both still possessed the skills to retire hitters at the highest level. While it likely won’t have any consequence on the club’s playoff chances (in excess of 96% at the moment), Boston would probably rather not be left hoping that Paul Byrd can party like it’s 2002 or that Daisuke Matsuzaka can, you know, throw a strike.

Michael Brantley, Indians

Grady Sizemore is done for the season. That’s a downer for any baseball fan, but at least we get to take an extended look at the PTBNL in the 2008 Sabathia Swap.

Brantley, 22 is a patient lefty hitter with serious wheels. His .267/.350/.361 line at AAA Columbus does not jump off the page, but Brantley worked the count well (11.4 BB%, 10.5 K%) while swiping many bags at a high-percentage clip (46 SB in 51 attempts, good for a 90.2% success rate).

Brantley doesn’t any lightning in his lumber (.094 ISO in 2009, .069 ISO in his minor league career), and he’ll have to establish himself in a corner spot with Cleveland. But fantasy owners searching for steals, without wanting to settle on some Willy Taveras-like out-machine, could do worse than Brantley.

Clay Buchholz, Red Sox

For a 25 year-old with a career 4.24 FIP in the major leagues, Buchholz sure has been subject of many “what’s wrong with him?” debates. The lanky 6-3 right-hander boasts a wicked mid-70’s curve (+0.62 runs/100 pitches career) and a low-80’s changeup (+1.03), as well as a nifty mid-80’s slider (+1.50). Buchholz’s 92-94 MPH fastball, however, has often missed the mark (-1.11).

In 2008, Buchholz called upon his heater just 47.4% of the time. He seems to be gaining trust in the offering this season, as he’s throwing it more (over 56%) and with better results (+0.15 runs/100). He’s not blowing hitters away (6.18 K/9), but Buchholz’s walk rate has fallen from 4.86 BB/9 in 2008 to 3.79 in 2009. His transition to the big leagues might not have been immediate, but there’s still plenty of reason to expect Buchholz to be a major asset for the Sox in the years to come.

Miguel Montero, Diamondbacks

Very quietly, Montero has authored a sweet .366 wOBA for the D-Backs in 2009. The Caracas, Venezuela native performed well in admittedly hitter-friendly venues in the minors, and he has gotten progressively better in the big leagues (.296 wOBA in 2007, .330 in ’08). Chase Field certainly helps, but even in a neutral venue, Montero has been impressive. Miguel has posted +10.6 Batting Runs (a park-adjusted measure of offensive value) this season, 5th among all backstops.

Montero is an awfully liberal swinger, taking a cut at 29.7% of pitches thrown outside of the strike zone and hacking at 75.3% of offerings within the zone (the averages are about 25% and 66%, respectively). However, that aggressive approach has not manifested in a high first-pitch strike percentage (his 55.2 F-Strike% is below the 58% MLB average), and Montero has drawn a walk in 8.6% of his PA.

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Alex Rios, White Sox

White Sox manager Ozzie Guillen, um, isn’t exactly fond of his newly-acquired outfielder. Picked up from the Blue Jays in a straight waiver claim in August, Rios has compiled a line with the Good Guys that would make DeWayne Wise puff his chest out in comparison (.140/.156/.215 in 97 PA).

The 28 year-old’s wOBA has plummeted from the .350-.360 range from 2006-2008 to a paltry .302 in 2009. Has Rios been the victim of very poor luck, or is there something deeper going on here?

The answer appears to be a bit of both. Punching Alex’s homers, K’s, stolen bases, line drives flyballs, pop ups and grounders into this expected BABIP calculator, we find that Rios’ BABIP “should” be around .306, instead of his actual mark of .274.

Even assuming all of those additional hits would be singles, that takes Rios’ line to .274/.322/.421 instead of .242/.290/.389. That equates to a wOBA of about .334. Clearly a step down from his ’06-’08 lines, though his league-average bat and typically plus defense might make that contract less onerous than it appears to be at first glance.

Of course, that’s not to say there’s no reason to be concerned. Consider the following trends:

-Rios’ walk rate has dipped 7.9% of his PA in 2007, 6.5% in ’08 and just 5.9% in 2009
-His K rate has risen from 16% in ’07, 17.6% in ’08 and 19.1% in ’09
-Rios’ ISO has fallen from .201 in ’07, .170 in ’08 and .147 in ’09
-Alex is getting jammed more often, with his infield/ fly ball rate climbing from 6.6% in ’07, 7.9% in ’08 and 12% in ’09
-Rios’ performance vs. fastballs has fallen off a cliff: +2.30 runs per 100 fastballs seen in ’06, +1.75 in ’07, +0.79 in ’08 and -0.13 in ’09.

Kyle Davies, Royals

Davies’ appearance here might seem like a head-scratcher. After all, the former Braves prospect has surrendered just two runs in 17 September innings. The results are great. The process, however, is not.

Davies has dished out six walks in each of his past two starts. The 26 year-old righty has long struggled to hone his low-90’s heat, high-80’s slider/cutter, mid-70’s curve and low-80’s changeup. Davies has issued 4.49 BB/9 during his major league career, and he is up to 4.83 BB/9 in 2009.

It’s just plain difficult to have any kind of sustained success when you put yourself at the mercy of the batter so frequently. Davies has placed just 43.6% of his pitches within the strike zone this season (49% MLB average). Not surprisingly, that has led to his falling behind the hitter often (52.2% first-pitch strike percentage). Davies’ punitive demotion to AAA Omaha offered promise (46.1 IP, 8.5 K/9, 2.7 BB/9), but he hasn’t been able to avoid the free passes with K.C.

Edgar Renteria, Giants

Signed to a 2-year, $18.5M pact during the off-season, Renteria has been little more than replacement-level in 2009 (0.2 WAR). While the 34 year-old plays a passable shortstop, his bat (-19 Batting Runs) has been all kinds of awful, even by Giants standards. Renteria’s pop continues to wane:

ISO, by year

2006: .144
2007: .138
2008: .111
2009: .079

Jermaine Dye, White Sox

Dye (who turns 36 this off-season) may find the free agent waters to be downright frosty this winter. His outfield D is DH-worthy (-17.4 UZR/150 in RF in 2009, and that’s an improvement on his 2006-2008 work). At the plate, Dye has been MIA since the All-Star break (.166/.266/.269; Jermaine, meet Alex. Alex, Jermaine).

It’s probably best not to jump to the conclusion that he’s suddenly “done”, though. Gruesome second half and all, Dye still has a .341 wOBA for the season, with a .204 ISO. His BABIP since the Midsummer Classic is stunningly low at .182.

Chris Volstad, Marlins

Volstad was vaporized for 24 runs in 19.2 IP during August, walking 13 batters and allowing 33 hits. His first September start (3 IP, 5 R, 5 BB) went little better.

Overall, though, Volstad has compiled a decent 4.39 Expected Fielding Independent ERA (XFIP, based on strikeouts, walks and a normalized home run/flyball rate). He has rates of 6.1 K/9 and 3.31 BB/9, but a huge 17.3 HR/FB% has put a massive dent in his ERA (now up to 5.17). The average for pitchers tends to be around 11-12%, and Volstad’s rate is the highest among all starters. That number should could down in 2010.