Where Did Cole Hamels’ Changeup Go?
We are excited to have Corinne Landrey join the FanGraphs writing staff. She’ll be contributing here several times per week, and is going to be an excellent addition to the site. Below is her first post as a FanGraphs author.
If you know one thing about Cole Hamels beyond his profession or employer, it’s likely the fact that he throws a magnificent changeup. It’s the pitch upon which Hamels’ impressive career has been built from the moment he made his major-league debut as a 22-year-old kid. Like any successful pitcher, Hamels has had to adjust and improve over the years first by refining his curveball and later adding a cutter to his repertoire, but the changeup has been the omnipresent ace up his sleeve throughout his major-league career. Until now, that is.
For the first time in Hamels’ decade-long career, his changeup is no longer serving as his go-to secondary pitch. That honor now belongs to the cutter he began using in 2010 after watching his teammate Cliff Lee use the pitch with tremendous results down the stretch the previous season. Since then, the pitch has developed into Hamels’ preferred third pitch and now its usage has officially surpassed the changeup:

This year Hamels has gone to the cutter 202 times, or on 24% of his pitches, whereas the changeup has been used just 185 times, or 22 percent of the time. This usage shift, however, is not the result of a season-long trend. In fact, during the month of April, Hamels threw his changeup more than he threw any other pitch, fourseamer included. But after his start on April 20th, something changed.

