Another great performance from Lester, hopefully swinging the "Pitching" part of our "Pitching and Defense" strategy back into full gear.
But, another game where he stayed away from the two-seam fastball and threw a
lot of changeups.
It's easiest to differentiate the two pitches on this plot, which shows the Spin Axis of the ball by pitch speed:

If you were wondering, Lester's changeup is primarily a weapon against RHH (this plot shown in the more conventional H-Mov x Speed Style):

Only one of those was thrown with a LHH at the plate. Rs and Ls here code batter handedness.
A final note: one of Lester's problems early in the year was difficulty sustaining velocity over the course of a start. He would seem to "tail off" in the fifth or sixth inning, and with it would go his control (or vice versa, impossible to know).

But, through his 120 pitches last night, he was able to sustain strength and keep firing heat as the game wore on. A good sign.
The changeup/two-seam thing is really baffling, though. I can understand if it's an approach that they're consciously deciding on, and maybe it's the next phase of his development. But whereas last season (and earlier) he threw only the very rare changeup, it seems to have become a consistent part of his arsenal this year.
Edited by Jnai, 05 May 2010 - 01:24 AM.