CHICAGO — Red Sox left fielder Carl Crawford has what the Red Sox are calling a "sprain" of his ulnar collateral ligament.
A conservative treatment was recommended, meaning rehabilitation as opposed to surgery. He also received a platelet rich plasma injection to try and speed the healing process.
The Red Sox did not issue a timetable for Crawford. But a team source told the Globe Crawford could miss up to three months.
Crawford started the season on the disabled list, recovering from surgery on his left wrist. The Red Sox tried a program of rest and rehabilitation on his wrist last fall but he ultimately had surgery.
Crawford, who is in the second year of a seven-year, $142 million deal, missed a month last season with a strained hamstring.
The statement from the team:
"Carl Crawford was examined by the Red Sox medical staff. He was diagnosed as having a left elbow ulnar collateral ligament sprain. A conservative treatment protocol was recommended. Carl was also examined by Dr. James Andrews who was in agreement with the assessment and plan. Carl received a Platelet Rich Plasma (PRP) injection and will be shut down from baseball activity during the initial phase of his treatment."