Although he has not thrown an MLB pitch in 2016, Jon Lester threw 28,974 pitches that were tracked by the PITCHf/x system between 2007 and 2015, including pitches thrown in the MLB Regular Season and the MLB Postseason. In 2015, he relied primarily on his Fourseam Fastball (93mph) and Cutter (89mph), also mixing in a Curve (76mph), Sinker (92mph) and Change (85mph).
Basic description of 2015 pitches compared to other LHP:
His fourseam fastball has slightly above average velo. His cutter has well above average velo and has strong cutting action. His curve generates a high number of swings & misses compared to other pitchers' curves, has little depth, results in somewhat more flyballs compared to other pitchers' curves and has slight glove-side movement. His sinker is a real worm killer that generates an extreme number of groundballs compared to other pitchers' sinkers, has slightly above average velo and has some natural sinking action. His change is a real worm killer that generates an extreme number of groundballs compared to other pitchers' changeups, generates more whiffs/swing compared to other pitchers' changeups, is much firmer than usual, has slight armside fade and has some natural sink to it.