Red Sox's Mookie Betts: Has been feeling knee since break
Betts' knee injury, which forced him to leave Friday night's game, has been developing since the All-Star break, according to Boston manager John Farrell, Bill Ballou of the Providence Journal reports.
Analysis:
Betts had been receiving occasional treatment on the knee before getting pulled from Friday night's game. He's listed as day-to-day and we should learn more Saturday.