John Ferrell, the Boston Red Sox manager, told Brian MacPherson of the Providence Journal that closer Koji Uehara is "not likely" to be ready for Opening Day because the 39-year-old felt more discomfort in his left hamstring on Saturday during a bullpen session. 

“He’s going to need some additional increase in intensity and rehab to the hamstring,” Farrell said. “He felt it a little bit yesterday in the bullpen. He’s still able to do throwing to the point of keeping his arm in shape to a certain extent, but we’re not game ready yet.”

There is no real timetable for Uehara's return, but it should not be super long. Uehara has been dealing with the hamstring ailment for about two weeks and has not gotten better since. 

As for now, the Red Sox will look to Edward Mujica to close baseball games, but other players could play the closer role depending on specific matchups and situations. 

“I will also say that we’ll look to matchups in the ninth inning as well,” he said. “We’ll look to exploit the best matchups, and that can be any one of three or four guys -- Junichi Tazawa, Alexi Ogando, and against tough lefties it could be Tommy Layne. We’re not limiting any of our options.

“I’m not saying this is strictly a closer by committee, but we would look to close games out with Eddie. But if there were certain situations that we feel like the better matchup is with a left-hander, I’m not opposed to doing it."

Boston's lineup looks pretty darn good rolling into the start of the season, but the starting rotation and late bullpen are a concern. However, do not be suprised if surprise pitcher comes out of no where to help out the The BoSox throughout the season. 

“Realizing that we’re 10 days or nine days from opening, even if Koji were to get in a couple of games, I think, we’d still remain open-minded to beginning [with him],” Farrell told reporters Friday, via MLB.com. “We’re talking about a one-inning reliever, a veteran guy, who has been able to keep his arm in shape, at least through long toss and at least some flatground. This is still day-to-day at this point.”