Finding Baseball’s Least-Effective Pitch
We have a pretty good idea of baseball’s best pitches. You’ve got the Aroldis Chapman fastball. You’ve got the Kenley Jansen cutter. The Adam Wainwright curveball. The Stephen Strasburg changeup. The Cole Hamels changeup. The Felix Hernandez changeup. The Corey Kluber whatever it is. The Clayton Kershaw curveball. The Kershaw slider. The Kershaw hypothetical splitter that, in my imagination, he doesn’t throw because he doesn’t need to because of his curveball and his slider. There’s no clear winner, but there are plenty of candidates, and all of them are amazing.
We don’t have as good an idea of baseball’s worst pitches. The truth is baseball’s worst pitches don’t get thrown often outside the bullpen. They’re projects in which pitchers don’t have confidence, so you don’t see them in games. But we can skip over to something related, something that might stand as a decent proxy: We have the data to identify baseball’s least-effective pitches. At least among pitches that are thrown more than once or twice a month. This is one of the uses of the FanGraphs pitch-value data, and if you set a 50-pitch minimum, the second-least effective pitch this year has been Wei-Chung Wang’s changeup. And the first-least effective pitch this year? That honor belongs to Drew Smyly.