Pedroia previously went on the DL with a hamstring injury in June and did not return until the All-Star break. In six games since returning he was 1-for-22 with one RBI.
Red Sox manager John Farrell told reporters Pedroia aggravated the injury recently and underwent an MRI on Saturday morning.
“I can't say it was a singular event that caused what he's feeling,” said Farrell. “As he was going at it each and every day, the symptoms continued to persist. After the further imaging and further consultation between the medical staff, it was determined the best course of action was to put him on the DL.”
Boston recalled right-hander Steven Wright to take Pedroia's spot on the roster, and Wright is starting against the Detroit Tigers on Saturday.
On the season, the 31-year-old Pedroia is hitting .287 with nine home runs and 34 RBIs in 75 games.
- Molly Geary