Tarik Skubal’s changeup made him MLB’s most coveted arm — and helped lead a strikeout revolution

The changeup used to be a change-of-pace pitch. Now, pitchers like Skubal and Cristopher Sánchez have turned it into a strikeout weapon.

DETROIT — They called it Changeup School. It was 2023, and Tarik Skubal was rehabbing from flexor tendon surgery and tucked away in the shadows. Skubal was a...