BOSTON (AP) — The Boston Red Sox placed designated hitter Masataka Yoshida on the 10-day injured list with a left thumb strain. The move, before Wednesday night’s game against the San Francisco Giants, is retroactive to April 29.

Yoshida injured his left hand when he was jammed on a pitch during his first at-bat in Sunday’s win against the Chicago Cubs. Yoshida stayed in the game, singling in his next at-bat, before coming out. He was examined by a hand specialist on Tuesday. Before Wednesday’s game, while manager Alex Cora spoke to the media, Yoshida was undergoing an MRI on his hand, which was significantly swollen.

“His hand is huge right now,” Cora said. “Hopefully, we know what’s going on and take care of him in 10 days and he’ll be back. But in that game, he actually felt it in the first (at-bat), got worse in the second one.”