James Loney will also get a fresh start, moving from the Dodgers to the Red Sox.
Loney was the only major-leaguer who came to the Red Sox in the deal that sent the three underperforming stars and more than $250 million in contracts to Los Angeles, signaling Boston's concession of the 2012 season. The Red Sox also picked up two prospects and two players to be named.
"I'm excited," Loney said in the Fenway Park interview room before Sunday's game against the Kansas City Royals. "This has always been one of my favorite parks. We got to come here in 2010. The fans are great here. You've got a lot of support and it's a great atmosphere."
Loney, 28, is a career .284 hitter who is batting .254 with four home runs and 33 RBI this season. A lifetime Dodger, he played three games in Fenway Park in 2010 when they visited for interleague play; the big story then was Manny Ramirez's return to Boston.
"That's all I've known," Loney said before putting on a Red Sox uniform for the first time. "But I'm also looking forward to this change and playing and winning in this city. I think it'll be great for my career."
Loney was in the Red Sox lineup, batting fifth and playing first base on Sunday. He made a nice pickup at first base on a short-hopper from third baseman Pedro Ciriaco, but also grounded into an inning-ending and rally-killing double play in the bottom half of the first inning and made another groundout in the third.
Also Sunday, designated hitter David Ortiz said he should know by the "end of the day" whether he will end his season to work on healing his sore right Achilles tendon. Ortiz missed 35 games with the injury before returning Friday and going 2 for 4 with a double.
But he felt soreness running the bases, and he was unavailable for Saturday night's 12-inning game and again on Sunday.
"Instead of just seeing the ball and hitting the ball, I'm thinking about how my foot is going to react once I take off running," Ortiz told reporters. "We're talking to the doctors and we're going to have some decision by the end of the game just to see how we're going to approach this."
Manager Bobby Valentine said Ortiz needed another day off.
"He didn't think today would be a good day to play," Valentine said. "We're definitely not going to do anything to jeopardize David's career. David wants to be a part of this team for a long time."
In other roster moves on Sunday, the Red Sox also optioned outfielder Che-Hsuan Lin to Triple-A Pawtucket and recalled right-handed pitcher Pedro Beato from Pawtucket.
Lin, 23, was recalled Saturday for his third stint with the Red Sox this season.
Beato was acquired by the Red Sox from the Mets on Aug. 16, completing the trade for catcher Kelly Shoppach.