Jon Lester has thrown 34,239 pitches that have been tracked by the PITCHf/x system between 2007 and 2017, including pitches thrown in the MLB Regular Season, the MLB Postseason and Spring Training. In 2017, he has relied primarily on his Fourseam Fastball (92mph) and Cutter (88mph), also mixing in a Curve (76mph), Sinker (91mph) and Change (85mph).
Basic description of 2017 pitches compared to other LHP:
His fourseam fastball has essentially average velo. His cutter has slightly above average velo. His curve generates an extremely high number of swings & misses compared to other pitchers' curves, results in more flyballs compared to other pitchers' curves and has little depth. His sinker generates a very high amount of groundballs compared to other pitchers' sinkers, generates more whiffs/swing compared to other pitchers' sinkers, has slight armside run and has some natural sinking action. His change generates more whiffs/swing compared to other pitchers' changeups, results in many more groundballs compared to other pitchers' changeups, is slightly firmer than usual, has slight armside fade and has some natural sink to it.