Mitch Keller began working on a new changeup grip last year with Altoona. The old one wasn't working, so he started using a circle changeup grip. The pitch wasn't one he trusted at first, as he needed to get comfortable with it while finding spots to use it in game situations. By the end of the year and into the Eastern League playoffs, we saw better results from the pitch in live views. That continued into the Arizona Fall League, where Tim Williams saw him pitch and talked to both Justin Meccage (then the minor league pitching coordinator) and Keller after the game.