Jeff Locke has never been, and will never be, confused for a dominant fastball/strikeout pitcher. He has relied almost exclusively on his location and movement while mixing in his off-speed bread and butter.
Appropriately, Locke has grown to rely on his two-seam fastball more often, attempting to fool batters with movement. According to FanGraphs, Locke is throwing the two-seamer 57.3% of the time in 2015, yet with only middling success, which I will show below.
As a refresher, here is a glossary of terms we will use in judging Locke’s two-seam fastball.