BOSTON — Red Sox closer Joel Hanrahan is contemplating season-ending surgery after being examined Friday by orthopedist James Andrews.

An MRI taken during the visit Friday showed flexor tendon damage in the right forearm, Boston manager John Farrell said. If an operation is performed, Hanrahan would miss the rest of the season and face the possibility of Tommy John surgery if damage is found to the ulnar collateral ligament of the elbow.

Ligament damage has been ruled out “to a certain extent,” Farrell said before Friday night’s game against the Toronto Blue Jays, “but in situations such as these type, once they have the ability to open up the arm and look at it directly, then they can make a more clear decision at that time if, in fact, Tommy John is needed.”

Hanrahan could choose to rest and rehabilitate the injury but still would miss at least two months. He was transferred on Thursday from the 15-day to the 60-day disabled list.

“Everything that shows right now is it’s the flexor tendon” that’s injured, Farrell said.