Xander Bogaerts left Wednesday night's 7-3 victory over the Tampa Bay Rays with tightness in his left quadricep.
Bogaerts, who was pulled after going 2-for-3 with two runs and an RBI single, is considered day-to-day.
John Farrell said the decision to pull Bogaerts from the lineup was "precautionary," and Bogaerts sounded optimistic that he'll be back in the lineup Thursday.
"If I feel the same way I feel right now, I probably will [play]," Bogaerts said. "I'll definitely be ready to go if I wake up feeling the same way I do right now."