When Doug Fister broke into the big leagues, he was a soft-tossing, pitch-to-contact change-up artist, who threw strikes with mediocre stuff and projected as a back-of-the-rotation innings eater or a bullpen guy. He wasn’t bad, but the lack of a quality breaking ball and his reliance on his change as an out-pitch meant that he didn’t have anything to strike out right-handed batters with, and he wasn’t generating as many groundballs as you’d expect from a 6’8 guy with good command. Over his first year and change in the big leagues in 2009-2010, he was basically the definition of average, running a 102 ERA-/99 FIP-/99 xFIP- in 232 innings. He limited walks and avoided home runs, so he looked like any member of the Twins rotation over the prior 10 years. Nothing wrong with that, but certainly not a lot of upside beyond strike-throwing middle-of-the-rotation guy.
Then, last year, Fister began to change. His velocity picked up, and instead of topping out at 91-92, he started hitting 93-94 with regularity. By the end of 2011, his average fastball was over 90 mph, up two full ticks over his 2010 average. At the same time, he began to rely less on his fastball/change-up combo, and increased his breaking ball usage, especially against right-handed batters. The increased velocity and pitch mix led to a spike in his strikeout rate, which jumped from 12.9% to 16.7%. In fact, he ended the year with a 28% strikeout rate in September, looking nothing like the pitch-to-contact guy who showed up a few years earlier.
This year, the velocity has regressed back to previous norms — perhaps due to a costochondral strain that landed him on the DL twice — but the strikeout rate has still taken yet another leap forward. Once again, Fister has reduced his reliance on his fastball, and now he’s featuring his curve ball more than ever before. In his start against the Yankees yesterday, he snapped 25 curveballs, 15 of which went for strikes. This big bending curve has now become his #2 pitch, and its effectiveness has been the driving force beyond his second drastic increase in strikeout rate.
Read the rest of this entry »