A few weeks back, Jason Collette -- he of FanGraphs and Process Report fame (just two of the places where you can find his work) -- inquired via Twitter whether anyone was keeping track of pitchers who were reportedly adding new pitches to their repertoire this spring. I hadn't been and wasn't planning to, but it struck me as a great idea. So, thanks, Jason!
And here is what I have compiled so far. I've also included pitchers who have made some sort of adjustment to an existing pitch and one pitcher -- Phil Hughes -- who is ditching a pitch.
Over the course of the season, I'll monitor how often each pitcher uses the new or improved pitch as well as how effective it is.
If this sort of thing interests you and you want to play along at home, here's the list so far.
Pitchers with new pitches:
Jake McGee - curve and changeup
Stephen Strasburg - slider
Ross Detwiler - cutter
Sonny Gray - changeup
Jake Odorizzi - splitter
Michael Wacha - curveball
Martin Perez - cutter
Shelby Miller - cutter
CC Sabathia - cutter
Brian Wilson - knuckleball
Jake Peavy - splitter
Felipe Paulino - cutter
Pitchers working on existing pitches:
Robbie Ross - changeup
Tony Cingrani - slider
Joe Kelly - curveball
Brett Oberholtzer - curveball
Matt Belisle - changeup (plans to use more often)
Tyson Ross - changeup
Taylor Jordan - offspeed pitches
Pitchers getting rid of pitches:
Phil Hughes - slider