The Red Sox second baseman said he hoped to return to the American squad if doctors allow, but that Boston officials are expected to take a cautious approach.
"Hopefully this is just a couple of days," Pedroia said.
Pedroia said he felt the injury during the team's workout Friday. Mark DeRosa is the only remaining second baseman on the roster. The team is likely to add a player from the provisional roster, such as Brian Roberts of the Orioles.