Boston Red Sox All-Star Willson Contreras left Friday night's 9-4 win over the Los Angeles Dodgers after being hit on the side of his helmet by a pitch in the third inning.
Contreras was struck by a 95 mph fastball from reliever Will Klein. The first baseman was checked by the medical staff before taking first base. He had already hit the dirt after Klein's first pitch of the at-bat.
"He got hit in the ear flap, so I think his ear was ringing a little bit," interim manager Chad Tracy said after the game.
Contreras left the game for precautionary reasons after the Red Sox finished batting.
"He's had some tests done so far, which have been fine," Tracy said. "The caveat to that is with stuff like that with the head, you're worried about concussions. You got to wait, let him sleep. He's got to get up tomorrow and see how he feels in the morning and do activity. We have to wait and see how he feels."
The Associated Press contributed to this report.