Gray worked 2 2/3 innings, surrendering one run on three hits with a walk and two strikeouts before being pulled from the game. He had just delivered ball four to Tigers second baseman Gleyber Torres when the issue surfaced.
Moments earlier, Gray stepped off the mound, reached to the back of his right leg, and crouched briefly as team officials visited him on the mound. He returned to throw one warm-up pitch before the Red Sox removed him from the game.
Red Sox manager Alex Cora, pitching coach Andrew Bailey, and the club trainer Brandon Henry were among those who came out to check on Gray, who then left the field for further evaluation.
The status of Gray and his potential impact on Boston’s rotation is not yet known, as additional updates from the team were not provided at game time. This developing injury is a setback for a Red Sox club already navigating pitching health concerns.