Archive for Felix Hernandez

Your lwts Fantasy All-Stars: American League

The All-Star Game voting discussion is topical in real life, so why not talk about it in fantasy?  I’m of the philosophy that All Star Games should be about the best players, not just the players off to a hot start over the first few months.  In this case, I’ll define “best player” as the players that offered the most production over the past calendar year (i.e. June 2010 through May 2011).  Below, the point values are FanGraphs Points, and the $ shown are the player’s average cost.  Without further delay, here are your American League (fantasy) All-Stars!

Catcher: Victor Martinez (746.5 pts, .368 wOBA, $25)
Alternates: Carlos Santana (571 pts, .352 wOBA, $31) and Mike Napoli (565 pts, .343 wOBA, $12)

Now primarily a DH, Martinez continues to be an excellent fantasy producer.  The guy can hit, and with catcher eligibility he’s just a terrific player–probably more so in fantasy than in real life, given his fielding issues.  Santana is back after missing time with injury, and has largely picked up where he left off last year.  Napoli might surprise some folks, but he got a lot of playing time after the first few months last year and produced very well.  If only he could actually catch, he’d get more PT…

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Kicking Rocks: That Guy

When I first sat down to write this week’s column, I was all set to spend my time bashing Adam Dunn.  You know, talk about how I built up the rest of my infield with the first two picks, grabbed King Felix in the third round and then, when all the other first base mashers were off the board, swoop in and steal Dunn and his 40 bombs in the fourth.  It was the “perfect” strategy right up until the part where Dunn decided he couldn’t hit anymore.  But then, as I was wrapping up my introduction, I got a text that changed my whole plan.  You know the text I’m talking about — the one from that guy in my primary league. Read the rest of this entry »


Pick Six Value Picks: Starters and Relievers

To close out our series of looks at the values of players in ottoneu Pick Six, we look today at pitchers.  As before, the numbers below are based on weighted averages of THT’s Oliver and BPro’s PECOTA (more weight to Oliver b/c it includes this season’s data).  The numbers are FP (FanGraphs Points per IP), though keep in mind that for starters this number is divided by four to keep starters from being the only thing that matters in pick six.

Starting Pitchers

Elite Five (they cost a fortune, but they’re worth it)

Tim Lincecum, 5.33 FP/IP, $48
Josh Johnson, 5.21 FP/IP, $38
Felix Hernandez, 5.04 FP/IP, $49
Cliff Lee, 5.04 FP/IP, $43
Roy Halladay, 5.01 FP/IP, $52

Johnson’s injury risk has kept his value down in traditional ottoneu, but when he’s healthy (currently has shoulder ouchie), he’s the best value of this group.  But you can’t go wrong here: more than any other pitchers in baseball, these guys should give you lots of productive innings per start.

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Kicking Rocks: Don’t Chase the Ace

For years I have preached about the immense depth at starting pitching.  You can find plenty of quality starters for cheap in your draft and, with the help of the waiver wire, can build a successful fantasy rotation without having to invest heavily in an ace or two.  With a nice complement of some quality relievers, you can go cheap on starters and, in turn, bulk up on better hitters.  In the end, your team dominates in the offensive categories, puts up a solid showing in almost all of the pitching categories, and leaves you at the top of your standings by season’s end. Read the rest of this entry »


Check the Position: SP1

Over the offseason we’ll take a look at each position on the diamond and see how the past season affected the positional rankings and where there might be some potential bounceback value picks going into next year’s drafts. (See shortstops, catchers, second basemen, first basemen, third basemen, right fielders, left fielders and center fielders.)

Of course, when it comes to pitchers, the format suffers. We’re certainly not about to do tiered rankings for the top 75+ pitchers that get drafted every year in mixed leagues – that would be one long post. Instead, I’m going to cover the pitchers by their location on your team. The first group consists of pitchers that could or should be selected to be fantasy aces in 2010. Let’s take a look.

This is where I drop some caveats. Everyone has their preferences, so order this tier as you will. The first tier is meant to be the no-doubt-about-it group. All of these guys won’t give you the strikeouts of Tim Lincecum and Zack Greinke, but they’ll come within a strikeout or two per nine innings. They won’t all have the miniscule WHIPs of Dan Haren or Roy Halladay, but none of them should break 1.2 in that category. They won’t all be the horse that CC Sabathia is, but they’ve all (so far) shown the ability to put close to 200 innings together. There are no guarantees when it comes to elbows and shoulders, but these guys look like bonafide studs.

The next group ain’t too shabby themselves. The first three only have question marks because they’re young and haven’t been doing this for ages. Despite my worries about Jon Lester’s walk rate in the minors, he hasn’t shown any problems since he made his cancer recovery. Felix Hernandez broke out last year, and just needs to show it again. Justin Verlander seems to have fixed his delivery, but will what broke before break again? The next two guys have question marks are about age and health. Chris Carpenter is a walking question mark, and his ongoing health issues make him overvalued after strong years and undervalued after injured years. In other words, I owned him often last year and may not own him once next year. Instead, I may own Johan Santana often this year, who should be next year’s Carpenter, despite his worrisome declining velocity and strikeout rates. Cliff Lee never had great strikeout rates to begin with and is going to the tougher league, but he may get some support for a higher ranking.

Originally, there was a tier between Lee and Adam Wainwright, but that tier was born more of intuition than anything in the numbers. Wainwright made just as big of a leap forward as King Felix in some ways, why should he be in another tier? Perhaps this imaginary tier has a combination of questions. Wainwright broke out – and has durability questions. Josh Johnson can probably repeat his performance, given his history, but he has definite durability questions. He’s put together just 364 innings total from 2007-2009. Josh Beckett is a favorite of mine, but for some reason he keeps putting up ERAs that are much higher than his FIPs, and maybe that’s just how he rolls. Ubaldo Jimenez induces mad ground balls and strikes out plenty, but his stats are still borderline. Aw, heck, put that tier back in.

The “just off” tier gives you a preview of some nice SP2 values that you could pair with a late SP1 for your best strategic approach. Consider that the number one pitcher on this list is projected by Bill James to put up an 2.80 ERA and 1.12 WHIP with 261 strikeouts, while the tenth guy may “only” contribute 3.08 ERA, 1.09 WHIP and 224 strikeouts. That, my friends, is why you wait to draft your starting pitchers.


Stacking Pitching To Flip Midseason

Recently, reader Pat left a comment on an article, asking:

“Can’t alot of pitchers HR/FB rates be expected to increase in the second half just due to the weather? … [T]herefore it would seem like a good strategy in a points league to stack pitching in the first half (and then look to make moves around the allstar break to acquire hitters).”

The reasoning here is that since bats tend to heat up as the weather gets warmer, hoard pitching early and then pick up hitters when the season is in full swing and 80 and 90 degree days are the norm.

Seems like a reasonable strategy, but would it work?

Since we would hoard pitchers early, let’s look at the top 20 starting pitchers, as determined by the final dollar values from the RotoTimes Player Rater, and check out their monthly HR and HR/FB data.

Pitcher HR HR/FB HR HR/FB HR HR/FB HR HR/FB HR HR/FB HR HR/FB
Zack Greinke 0 0.0 0 0.0 3 7.3 3 8.8 5 10.2 0 0.0
Tim Lincecum 1 4.0 0 0.0 3 6.7 2 8.3 2 5.3 2 8.3
Felix Hernandez 1 3.7 5 12.8 1 3.2 3 8.6 4 12.9 1 2.7
Javy Vazquez 1 4.2 5 13.5 4 12.9 2 7.4 5 12.8 3 7.5
Justin Verlander 3 8.1 1 2.5 3 9.4 5 10.0 5 8.5 3 5.7
Adam Wainwright 1 2.9 6 14.3 5 17.9 1 3.3 2 5.7 2 5.9
Roy Halladay 4 14.8 2 5.7 1 8.3 4 9.5 8 18.2 3 6.3
Dan Haren 3 9.4 5 12.2 3 8.1 3 8.3 8 17.4 5 12.8
Chris Carpenter 0 0.0 0 0.0 3 7.3 1 3.7 3 7.5 0 0.0
CC Sabathia 2 6.9 2 3.5 5 11.9 3 7.0 5 13.2 1 2.9
Josh Johnson 2 8.0 2 6.5 2 5.7 3 9.7 3 9.4 2 6.3
Jon Lester 5 16.7 6 16.7 2 7.1 0 0.0 3 11.5 4 12.9
Matt Cain 2 5.1 4 8.9 5 11.1 1 2.3 7 14.6 3 7.1
Josh Beckett 3 10.0 3 13.0 1 3.8 3 8.1 12 27.3 3 8.6
Wandy Rodriguez 0 0.0 1 2.4 11 29.7 2 6.1 5 11.9 2 6.7
Jair Jurrjens 0 0.0 4 9.3 2 7.1 2 4.9 5 11.6 2 4.2
Ubaldo Jimenez 0 0.0 2 6.5 2 7.1 3 10.7 3 7.9 3 13.6
Ted Lilly 5 11.9 6 11.1 5 8.6 3 12.5 2 8.0 1 2.0
Cliff Lee 2 5.4 2 4.1 4 10.8 2 3.3 3 7.5 4 10.5
Randy Wolf 2 4.9 6 12.5 7 15.9 2 4.9 3 5.5 4 12.1

If HR prevention is the goal of this strategy, 16 of our 20 top pitchers had a HR/FB rate less than 11 percent in the final month of the season. Even August, the month last year where more HR by far were hit than any other, saw eight of our 20 pitchers have a HR/FB rate beneath 11 percent.

And this does not even take into account that the pitchers who were ranked top 20 at the beginning of the year often are nowhere to be found near the top of the leaderboard at the conclusion of the year. Using my friend Troy Patterson’s 2009 Starting Pitcher Rankings, here are the ones that did not make the top 20 at the end of the year:

Johan Santana (1), Brandon Webb (4), Jake Peavy (5), Cole Hamels (8), James Shields (10), Roy Oswalt (11), Ervin Santana (13), John Lackey (14), AJ Burnett (15), Edinson Volquez (16), Scott Kazmir (17), Carlos Zambrano (18), Chad Billingsley (19) and Daisuke Matsuzaka (20).

If you went into your draft convinced to load up on pitching, you could have wound up with a staff of Santana, Webb, Peavy, Hamels, Oswalt, Lackey and Burnett and at the All-Star break found other owners willing to offer you very little hitting in return.

Now, let us look at how pitchers as a whole fared in 2009. Here are the first and second half splits for all of the pitchers in MLB in 2009:

1st half – 4.32 ERA, 1.389 WHIP
2nd half – 4.33 ERA, 1.391 WHIP

It does not always work out this close, but this is yet another example of how easy this strategy could go awry.

Finally, you also have to consider how your league will handle trading with you when you have such an obvious need for hitters. Will your league-mates be willing to help you out and offer fair or even somewhat reasonable trades given how needy you are for offense? In friendly leagues that might not be a problem but it would likely be a bigger issue the more competitive your league is.

The best pitchers can dominate (or like Rodriguez in June – get lit up) at any point in the season. Stacking up on pitching only to turn around and deal it for hitting at the All-Star break seems like the fantasy baseball equivalent of market timing and not the best way to ensure long-term success.


FIP Challenge Results Part II

Earlier today, in Part I of the series, I published a chart of 34 pitchers who had a difference of 0.50 or greater between their FIP and xFIP at the All-Star break and their 2nd half ERAs. Here I want to go into more detail rather than just giving a raw score for the two metrics

In rating the two systems, I considered the metrics to recommend keeping a pitcher if at the All-Star break they were at 3.50 or lower, to listen to a trade if they were between 3.51 and 4.00, to actively look to sell the player if they were between 4.01 and 4.50 and to either sell or cut a pitcher if they were above 4.51.

Of course, we also have to consider what the pitcher’s actual ERA was at the break, too. A pitcher could still be a sell candidate if one of the metrics was significantly higher than his ERA. For these extreme cases, I considered a difference between 50-75 points to be a “listen” candidate, while above 75 to be a “sell high” guy.

Zack Greinke – His xFIP was 101 points higher than his ERA, making Greinke a sell high guy. This was a big win for FIP.

Joel Pineiro – After allowing just three home runs in 17 first half games, Pineiro served up eight home runs in 15 games after the break. This was a big win for xFIP.

Tim Lincecum – It was a very good second half of the season for Lincecum, just not as good as the first half. He did have a slightly higher HR/FB rate in the second half, and xFIP did a better job predicting his post-break ERA. Still, those fantasy owners who kept him based on his FIP did not end up disappointed.

Dallas Braden – Made just four starts after the break due to a foot infection. Officially a win for xFIP, but one we should probably dismiss due to lack of playing time.

Paul Maholm – His second half ERA was lower than his first half one, despite more HR allowed. Still, this was a pitcher that FIP would have identified as a potential buy candidate at the break, so a win for xFIP.

Tim Wakefield – Made just four starts in the second half due to leg and back injuries. Officially a win for xFIP, but one we should probably dismiss due to the lack of playing time.

Clayton Kershaw – He had a 5.0 HR/FB rate at the break and was even better in the second half, as he finished the year with a 4.1 mark. His ERA finished two full runs below what xFIP predicted. This was a big win for FIP.

Derek Lowe – Opponents posted an .888 OPS versus Lowe in the second half of the season, including 10 HR in 331 ABs. This was a big win for xFIP.

Cliff Lee – Everyone thinks the move to the NL turned things around for Lee but he was 3-0 with a 1.44 ERA in his first three games with Cleveland after the break. His HR/FB rate has been below 11 percent the past five seasons. This was a big win for FIP.

Carlos Zambrano – This was the closest one, as Zambrano’s second half ERA of 4.14 was just barely closer to his first-half FIP than his xFIP. Zambrano pitched worse in the second half than in the first, but it had nothing to do with his HR rate, which declined slightly from the 5.8 he posted in the first half. This was a slight win for FIP.

Jair Jurrjens – Both FIP and xFIP predicted Jurrjens’ ERA to rise in the second half and instead he pitched even better after the break. If you went strictly by FIP at the break, you would have listened to offers for Jurrjens. If you went by xFIP you were in the sell/cut area. This was a win for FIP.

Jeff Niemann – As with Jurrjens, both of our metrics predicted an ERA rise from Niemann in the second half. FIP had him as a sell while xFIP had him as a sell or cut guy. This was a slight win for FIP.

Nick Blackburn – Yet another pitcher that both metrics forecasted a rise in ERA. Except this time, the actual rise was more drastic than even the more pessimistic xFIP predicted. Since you might have kept him if you used FIP, this was a big win for xFIP.

Edwin Jackson – Pretty much the same thing as with Blackburn above, except you were even more likely to keep Jackson if you used FIP. This was a big win for xFIP.

Mike Pelfrey – The spread with our two metrics was not nearly as great with Pelfrey as it was for Blackburn and Jackson, but the end results were the same. This was a big win for xFIP.

Jon Garland – FIP projected Garland to be virtually the same in the second half as he was in the first half while xFIP had him being noticeably worse. The trade to Los Angeles invigorated Garland, or perhaps it was simply leaving a bad home park, as he finished the year with a 5.29 ERA at Chase Field and a 1.67 ERA at Dodger Stadium. This was a win for FIP, but probably not a pitcher anyone was targeting at the break.

Felix Hernandez – Again, both metrics predicted an ERA rise in the second half, although xFIP was more pessimistic, making him a sell high guy with a difference of 94 points. Hernandez pitched even better after the break, making this a big win for FIP.

Justin Verlander – Both metrics predicted an ERA drop in the second half for Verlander, with FIP being the most optimistic. Verlander pitched well, but saw his ERA go up, making this a win for xFIP.

Brian Bannister – A 3.66 ERA in the first half made Bannister look like a useful pitcher. Both metrics saw an ERA increase, but xFIP was the most pessimistic. This was a big win for xFIP.

C.C. Sabathia – Our two metrics were split on how Sabathia would fare in the second half. With a predicted decrease from his first half ERA, this was a big win for FIP.

Brad Penny – Our two metrics were split again. But Penny’s ERA went up in the second half. This was a win for xFIP, but not many people who used FIP were angling to acquire Penny.

Vicente Padilla – His HR/FB rate went up significantly in the second half, yet Padilla produced a lower ERA after the break, thanks to a move to the NL. Neither metric identified Padilla as a pitcher to target, although FIP came very close to hitting his actual mark.

Jarrod Washburn – Both metrics identified Washburn as a sell candidate as his ERA was 92 points lower than his FIP and 150 points lower than his xFIP. Officially a win for xFIP, although you likely would have made the same decision regardless of which metric you used.

Jered Weaver – A win for xFIP, which had him as a sell, while FIP had him as a listen. There are also extra points for xFIP for exactly predicting his second half ERA.

Joe Blanton – The metrics were split on how Blanton would fare in the second half. This was a big win for xFIP, which forecasted him to be a useful pitcher and he ended up better than that.

Bronson Arroyo – Technically a win for xFIP but not many fantasy players were running out to acquire Arroyo based on his 4.99 first half xFIP.

Jamie Moyer – Repeat the comment from Arroyo, except sub in 5.06 xFIP.

Trevor Cahill – Same as the above two, except with a 5.18 FIP.

Chris Volstad – Our two metrics were split on Volstad. FIP saw him continuing to be a sell/cut guy while xFIP saw him being a useful pitcher with a sub-4.00 ERA. This was a win for FIP.

Rick Porcello – Both systems predicted a rise in ERA but FIP elevated him to cut status. This was a win for xFIP.

Braden Looper – The two metrics were split on Looper, with xFIP predicting a drop in ERA. Looper actually pitched worse in the second half but neither system would have advocated acquiring him at the break.

Josh Geer – Made just three starts after the break due to lousy pitching. Not one that either system would have suggested to add.

Rich Harden – While most of the players with above average HR/FB rates have been of little or no value in regards to fantasy, Harden is the exception. Both systems saw him improving on his first half ERA but xFIP was much more bullish. And Harden exceeded those expectations. This was a big win for xFIP.

Randy Johnson – Appeared in just four games after the break due to a rotator cuff strain. Officially a win for FIP, but one we should probably dismiss due to lack of playing time.

*****

If you made your fantasy decisions this year based on xFIP, you would be feeling very good about your choices with Pineiro, Lowe, Blackburn, Jackson, Pelfrey, Bannister, Blanton, Harden and to a lesser extent Maholm, Verlander, Weaver and Porcello.

If you made your fantasy decisions based this year based on FIP, you would be feeling very good about your choices with Greinke, Kershaw, Lee, Hernandez, Sabathia and to a lesser extent Jurrjens and Volstad.

From a pure bulk standpoint, you were better off in 2009 using xFIP at the break. But those who relied on FIP were more likely to make the right call on four of the five pitchers with the lowest ERA in the second half among the 34 pitchers in our sample.

We really cannot make any inferences for the future based on this one small sample. What we can say is that judging strictly from results in 2009 it would be a mistake to ignore FIP completely and absolutely while making fantasy decisions at the All-Star break. This year if you used xFIP you would have made the wrong decisions on some of the best pitchers in the game.


Fantasy Links — 9/24/2009

The Yankees clinched a playoff berth the other night and the Cardinals’ magic number sits at 1. It’s going to be an exciting October yet again, with some really intriguing match-ups forming in both leagues.

Major pro sports leagues no longer really have offseasons, especially when it comes to coverage. We’ll be here all winter, up to our usual tricks. And if you haven’t already, check out FanGraphs’ beautiful new iPhone app. I’ve been playing around with it all morning and am simply in love. Let’s check out some other sites who are doing great work…

The fellas over at FakeTeams are beginning to look ahead to next season, starting with a breakdown of the Top 10 fantasy pitchers for 2010. The usual suspects top the list: Zack Greinke, Felix Hernandez, Roy Halladay and CC Sabathia.

Still plugging away in your fantasy league this season and looking for a few spot starters? R.J. White of Fanhouse suggests looking at Bronson Arroyo, who has pieced together 11 straight quality starts, Brett Anderson, who is coming off a 10-strikeout game and Vicente Padilla, who has struggled recently but is facing Washington.

Matt Snyder, also writing for Fanhouse, provides an early preview of the 2010 group of closers. A lot can change in the offseason with free agency and trades, but it’s a nice look into the future.

Rotoworld’s Aaron Gleeman reviews Tim Hudson’s impressive return to action. The veteran right-hander is 2-1 with a 3.56 ERA in five starts since returning from Tommy John surgery and was impressive in damage control Wednesday against the Mets. As Gleeman notes, “His average fastball has clocked in at 90.1 miles per hour after living between 90.3 and 90.9 in the four seasons prior to going under the knife, his breaking-ball velocity is also similar to pre-surgery levels, and perhaps most importantly he’s maintained the extreme ground-ball tendencies that have long keyed his success.”

The Hardball Times’ Derek Carty asks an interesting question, and THT’s Eriq Gardner provides an answer: “What do you think has a greater impact on one’s ability to win a fantasy baseball league: player evaluation or strategy?” It’s something to think about as the 2009 season comes to a close.

Have a question, comment or link to share? E-mail me or find me on Twitter.


Slowey is Slower

Kevin Slowey shows us that it’s not enough to just not walk guys. If your stuff is hittable, batters will earn their bases on the field.

That said, Slowey had a very nice year last year, and with a K/9 right around the league average (6.90 K/9), there was some hope that he would build on the campaign and take another step forward this year.

So far, fans and fantasy managers are still waiting for that step forward. Instead, Slowey’s strikeout rate has fallen almost a full run (6.02), and his 1.54 WHIP is full of dinks, dunks and blasts. It’s certainly not walks, as Slowey still sports an elite walk rate (0.89 BB/9). The question lingers: how much of this poor start is lousy luck and how much is due to mediocre stuff?

Luck has surely played a big part. His BABIP is .370 and his FIP is 4.44, so his ERA is a little bloated by the luck of the bounce. But even the secondary statistics can’t agree about his luck. He’s sporting a 35.4% infield fly ball rate, which is unsustainably lucky (it’s 15% for his career). Also, he’s stranding 76.6% of his baserunners, which is slightly lucky. And for a guy with a career home run rate over 1 per game, his 10.8% home run per fly ball rate is very neutral.

He’s also giving up a career high 24.1% line drive rate, which is a good spot to start talking about his stuff. With an 89 MPH fastball, an 84 MPH slider, a 74 MPH curveball and an 83 MPH changeup, there’s just not enough differentiation in speed between his pitches to really keep the hitters off balance. He’s usually in the zone (see his walk rate), and his 91.3% contact rate in the zone puts him at 24th worst in the league in that category. (Teammate Glen Perkins ‘leads’ the league with batters making contact on 98% of pitches inside the zone, and Nick Blackburn is 23rd, so there’s something in the water in Minnesota, it seems.)

A quick look at some pitch F/X samples doesn’t provide too many clues. Slowey’s slider is actually breaking a couple inches more this year, and the rest of his stuff seems intact, with one major caveat. Slowey has lost almost a mile per hour on his fastball (89.9 to 89.2). His slider has lost one and a half miles per hour (85.7 to 84.1). Since he wasn’t much of a strikeout pitcher to begin with, and his stuff isn’t very fierce either, this slight velocity loss may be some of the reason for his poor start this year. Without more velocity history, it’s hard to tell if this is a temporary blip or not, but a peek at his next pitch f/x data would be a good idea for those thinking of acquiring him. A few ‘90’s on the gun would serve him well.

Another interesting question that arises when looking at Slowey’s numbers is if he should pitch outside the zone a little more. Batters are reaching on 26.2% of his offerings outside the strike zone, a number in line with his past (25.9% career). That number also puts him right next to such strikeout luminaries as Felix Hernandez and Jake Peavy. Since batters make contact on 72.9% on those pitches, it may be possible that Slowey could expand his zone a little for better results.


King Felix isn’t showing improvement

Felix Hernandez’s ERA has improved in every season he’s been in the majors. But don’t let that fool you: he’s not showing signs of improvement and 2008 was perhaps his worst season yet.

Hernandez had a 175/80 K/BB ratio in 200 innings this year, while allowing 17 homers and posting a 3.45 ERA. However, his walk rate was higher than it has ever been before: he allowed 3.59 walks per nine innings, well higher than the 2.51 and 2.83 rates he posted over the last two years. Furthermore, while his strikeout rate remains high, it doesn’t seem to be improving: he struck out 7.85 batters per nine this year, while striking out 7.80 last year and 8.29 in 2006.

Additionally, Hernandez induced fewer swinging strikes than he had in the past. In 2006, batters swung and missed at 8.6% of his pitches, after swinging and missing at 9.7%, 9.0%, and 10.0% over his first three years. This isn’t a significant decrease, but it’s certainly worth noting, especially considering the accompanying rise in his walk rate. He also received fewer called strikes than in the past: 17.1% of his pitches were taken for strikes this year, as compared to 18.9%, 18.3%, and 19.6% over the past three years. This could further attest to diminished control.

Also, Hernandez’s homer rate had been abnormally high over the previous two seasons: in 2006 and 2007, 16.4% and 15.0% of his fly balls had become homers. In 2008 this rate regressed to the mean, and only 9.9% of his fly balls became homers. However, another rather disturbing thing happened: Felix stopped inducing nearly as many ground balls as he had in the past.

In 2008, Hernandez induced grounders on 52.1% of the balls in play against him; in 2007, that was 60.8%, in 2006 it was 57.7%, and in 84 innings in 2005 it was a whopping 67.1%. While 52.1% is still a lot of ground balls, one of Felix’s biggest strengths in the past was his ability to induce as many grounders as, well…just about anyone. Thus, while his HR/FB rate fell almost 7% from 2007, he only allowed three fewer homers in 2008 than he did in 2007 (granted, he also pitched 10 more inning in 2008), thanks to the fact that he allowed 39 more fly balls in 2008.

Finally, it’s well worth noting that while Hernandez’s velocity remained constant, his pitch selection was different in 2008 than in the past. After throwing fastballs 57% of the time in 2006 and 2007, he threw a fastball 65.9% of the time this year. However, after using his slider 20.7% of the time in 2007, he used it only 12.3% of the time in 2008. He also used his curveball less frequently than in the past, throwing it only 8.5% of the time, as compared to 12.4% in 2007 and 20.6% in 2006.

There’s no denying that Felix Hernandez has absolutely filthy stuff. Furthermore, he’s still only 22 years old, and thus has plenty of time to improve. And when that improvement does come, it’s quite possible that it will happen fairly quickly: unlike hitters, pitchers tend to reach new levels rather suddenly, rather than gradually. A good example of this is CC Sabathia – if you look at his stats, you’ll see that he was incredibly consistent from age 20 through age 24, before kicking it into a whole new gear.

Hernandez may find that new level next year, or in five years, and there’s a chance that he may never find that new level at all. However, Hernandez does not appear to be improving so far. In 2008, his walk rate was up, his ground ball rate was down, and he induced fewer swinging strikes. This does not mean that he won’t “figure it out” next season, but it does mean that unless he shows significant improvement next season, his ERA is very likely to rise. Don’t be fooled by the apparent “progress” he’s made by lowering his ERA for three straight seasons: 2008 was perhaps Hernandez’s worst season in the majors. He has ample upside, but be wary of him in 2009.