Like with any art form, the rules, limitations and conventions for the art of pitching are constantly being rewritten. All it takes is one guy and one pitch for something that seems impossible in theory to become very much possible in reality.
So it was on June 1 at Coors Field, when a 96 mph changeup suddenly appeared:
There have technically—but maybe not actually, given that it's not unheard of for certain pitches to get misclassified—been faster changeups during the 15-year pitch tracking era, but 96 mph is at least the highest velocity ever achieved on a strikeout by a changeup.