Originally Posted by jojo
A general understanding of pitcher development indicates the transformation suggested is swimming against the current.
Pitchers learn new pitches and improve the ones they already have all the time. Their main goals... to change velocity and to add movement. That and location are the holy trinity of pitching. If pitchers couldn't adjust those, they would never get better or worse.
Poetically, last season, Leake taught Arroyo a new way to throw his changeup and it made a world of difference.