Felix Doubront will stay off DL

BALTIMORE -- Boston Red Sox left-handed reliever Felix Doubront has a mild strain of his upper pectoral muscle near the collarbone on his glove side, manager Terry Francona said Wednesday, and will not pitch for the remainder of the series versus the Orioles.

Doubront flew back to Boston on Wednesday morning from Baltimore and was given both an MRI and a CT scan to determine the source of his discomfort. Those tests came back negative, Francona said, and Doubront will not require a trip to the disabled list, which would have made him the 20th Red Sox player to go on the DL this season.

Doubront was prepared to fly back to rejoin the team, but Francona said the lefty wasn't going to pitch on either of the next two days against the Orioles, so the Red Sox elected to have him stay in Boston. He is expected to be back in the bullpen for Friday night's scheduled game against the Chicago White Sox in Fenway Park.

Francona said Doubront first noticed the discomfort Tuesday when he lifted his glove to receive a return throw from catcher Victor Martinez. Doubront pitched in the eighth inning Tuesday night and gave up two bases-empty home runs in Boston's 5-2 loss.

Gordon Edes covers the Red Sox for ESPNBoston.com.