BOSTON (CBS) – Just hours after placing closer Andrew Bailey on the disabled list, replacement closer Joel Hanrahan had to leave the Red Sox’ 6-5, 11-inning win over the Minnesota Twins on Monday night with forearm tightness.

Hanrahan, who returned from the DL last Tuesday after missing 15 games with a right hamstring strain, will undergo an MRI on Tuesday.

It was another rough outing for Hanrahan on Monday night, as he blew his second save in six opportunities this season. Hanrahan surrendered a home run to Brain Dozer — the fourth longball he’s surrendered in his nine appearances — in the Top of the ninth to tie the game 5-5. After striking out Joe Mauer for the innings second out, he walked Eduardo Escobar, and after a pickoff attempt and another pitch, had to call for the trainer.

“The pickoff at first, the ball barely got there,’’ Hanrahan said after the win. “I threw one more. I couldn’t take it anymore.’’

Hanrahan immediately went to the training room where he was diagnosed with the forearm tightness. He said he felt the pull on the 1-1 pitch he threw to Dozier, which skipped passed catcher Jarrod Saltalamacchia.

“I threw the pitch and felt a little pull. My forearm went with the ball,” said Hanrahan.

Hanrahan sounded optimistic after the game, but frustrated that he could he heading back to the disabled list for the second time this season.

“I talked with some of the trainers, and I feel all right about it. When we get an MRI taken on it, we’ll have a better idea. But it’s frustrating. It’s something I’ve never felt,” he said. “This isn’t how I planned my time with the Red Sox going — dealing with the hamstring thing right out of the gate, and been back for two games, three games, and now this happens. Hopefully everything will check out all right tomorrow, it won’t be too serious, and I’ll get some time back later on.”

Roche: Key Is To Keep Winning Series

With both Bailey and Hanrahan hurting, manager John Farrell is left searching for a ninth inning replacement. Koji Uehara and Junichi Tazawa are two options, and even the recently demoted Alfredo Aceves could return for the ninth inning.