Spinvestigation: Luscious Locks Edition

Friday night, umpire Ted Barrett got up close and personal with James Karinchak:
No, Barrett wasn’t looking for hair care tips, or acting out an Herbal Essences commercial. He was checking for foreign substances at the behest of Twins manager Rocco Baldelli. Though he ruffled around to the best of his ability, Barrett didn’t find anything definitive. Karinchak made it back to the dugout with a narrow lead and his pitching eligibility intact, though his dignity may have been affected.
Baldelli’s accusation wasn’t some off-the-cuff act of pettiness. Karinchak has been at the sticky center of controversy ever since the league cracked down on pine tar, Spider Tack, sunscreen/rosin blends, and whatever other tacky options players were using to increase spin. Stricter enforcement of existing rules started at the beginning of June last year; take a look at Karinchak’s spin-velocity ratio and raw fastball spin rate and you can clearly see when things changed:
Not coincidentally, Karinchak’s results slipped at the same time. He’d been an unhittable, fire-breathing, back-of-the-bullpen monster since reaching the majors. From June 1, 2021 onwards, however, he posted a 5.40 ERA and a 5.41 FIP, and got demoted to the minors at the end of August. The fall from grace was swift, and seemed obviously related to the change in foreign substance enforcement. Read the rest of this entry »