From 2008 to 2010, there were only six pitchers in baseball better than Jon Lester, and you can probably identify them all by first name — Roy, Cliff, Tim, Zack, CC and Justin. Last year however, was a different story. Lester was still one of the top 30 pitchers in the game, but he was ensconced safely outside of the top 10. While many expected a rebound, or at least for Lester to plateau in 2012, he has continued his descent, with the exclamation point coming yesterday, when he allowed 11 runs in four innings to the Blue Jays.
As we noted last week with Jonathan Sanchez, part of Lester’s trouble may stem from the fact that while his fastball velocity is declining, his changeup velocity is increasing. The changeup hasn’t been a problem for Lester this season, but his fastball certainly has. Lester has not even lost a mile and a half on his four-seamer, and it is still the ninth-fastest four-seamer among left-handed starters. But that sentence is a bit of a tip off, isn’t it? Two seasons ago, that sentence would have read “tied for 11th-fastest in the game.” Now, it needs qualifiers. Also, it is getting hit hard — he is allowing a .397 wOBA on his fastball this season.
Still, that’s not what is most troubling. In 2010, when Lester posted a 3.13 FIP, he allowed a .396 wOBA on his fastball, so clearly he can be effective without a dominating fastball. But what Lester does need to be effective are the pitches that break — his cutter, curveball and sinker — and right now, they are not. His cutter, in particular, has been a mystery. For starters, he is either throwing it less frequently or he has been throwing it in a way that makes it harder to identify as a cutter. That can sometimes be attributable to a computer or user error or change in how pitches are identified, but if it isn’t, it’s a big issue for Lester moving forward. Over the last three seasons, the cutter had been Lester’s bread and butter, and had been one of the most effective cutters in the game. From ’09-’11, he threw it 20.5 percent of the time. This year, that has dipped to 11.5%. Hitters are still having trouble squaring up the pitch, but they’re not missing it with the frequency they have in the past — his SwStr% on his cutter is four percent lower than it has been the past three seasons.
Read the rest of this entry »