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BOSTON -- The Boston Red Sox made a couple of moves on deadline day, trading Ramon Ramirez to the San Francisco Giants and designating outfielder Jeremy Hermida for assignment.

To take Hermida’s spot on the roster, the Red Sox promoted 22-year-old prospect Ryan Kalish from Triple-A Pawtucket and immediately inserted him into today’s lineup, hitting eighth. Hermida had been penciled into the original lineup.

Kalish, who will wear No. 55, was hitting .294 in 37 games for Triple-A Pawtucket, with 5 homers, 18 RBIs, 22 runs scored and 12 stolen bases. Prior to being promoted earlier this season, he hit .293 with 8 homers, 29 RBIs, 35 runs scored and 13 stolen bases in 41 games for Double-A Portland.

It was immediately unclear what the Red Sox got from the Giants in return for Ramirez, who was 0-3 with a 4.46 ERA in 44 appearances this season. To take his spot, the Red Sox have promoted reliever Dustin Richardson.

Richardson’s stint in Boston could be a short one, as the team announced earlier in the afternoon their plan to convert lefty prospect Felix Doubront from a starter to a reliever. The team also could call up converted starter Michael Bowden in the Pawtucket bullpen.

Hermida, who was acquired from Florida via trade over the winter, struggled during his short time in Boston. He missed significant time with a rib injury and hit only .203 with 5 homers and 27 RBIs in limited time. The Red Sox now have 10 days to either trade or release him.

Richardson was promoted to Boston on June 12 and appeared in 13 games for Boston with a 2.57 ERA. He was optioned back to Pawtucket on July 21.

ESPNBoston.com's Joe McDonald contributed to this report.

BOSTON -- The Red Sox have traded right-handed reliever Ramon Ramirez to the San Francisco Giants, and have recalled left-hander Dustin Richardson from Triple-A Pawtucket.

Details of the trade are not known at this point.

Ramirez was 0-3 with two saves and a 4.46 ERA this season. Richardson was promoted to Boston on June 12 and appeared in 13 games for Boston with a 2.57 ERA. He was optioned back to Pawtucket on July 21.

More to come. . .

ANAHEIM, Calif. -- While the Red Sox are on the hunt for relievers, one major league source said Monday that the Sox have indicated some willingness to move either Manny Delcarmen or Ramon Ramirez in the right deal.

That possibility may well be predicated on whether the Sox succeed in lining up additional relief help, although the same source said that the Sox are not prepared to pay the price of at least one quality prospect, and possibly two, that the Toronto Blue Jays are asking in return for lefty Scott Downs.

Another lefty that could pop up on the Sox radar is Nationals left-hander Sean Burnett, whose changeup has not been as good as it was before he underwent Tommy John surgery but he still throws a 91- to 93-mile-an-hour fastball and has put up pretty good numbers for the Nats: a 3.03 ERA in 45 appearances, 32 hits and 12 walks in 32 2/3 IP, with 31 strikeouts. Oddly, his lefty-righty splits are backwards this season: He is holding righties to a .184 average, while lefties are batting .321.

DETROIT -- Saturday's loss wasted one of the Red Sox's best relief outings of the season: Jonathan Papelbon's 2 1/3 scoreless innings. The Boston closer came in after Hideki Okajima had blown a 6-4 lead in the eighth inning and retired Adam Everett with runners on second and third to end the inning, then kept the Tigers off the board in the ninth and 10th innings.

Papelbon only allowed one baserunner -- on a 10th-inning single by red-hot rookie Brennan Boesch -- and needed just 26 pitches to get seven outs. In contrast, Tigers starter Dontrelle Willis needed 86 pitches to retire 10 hitters.

"That was as good a relief performance as you are ever going to see," Red Sox manager Terry Francona said. "We needed him to get us as many outs as he could, and he did it with great efficiency. It isn't easy to get that many outs and only have to use 26 pitches. We didn't win the game, but he certainly gave us a heck of a chance."

No second guessing: The game ended with Ramon Ramirez walking Ramon Santiago with the bases loaded in the bottom of the 12th -- his second walk in the three batters he faced -- and none of the pitches were close to the strike zone. That didn't mean Francona was doubting his decision to have Ramirez in the game.

"Ramon's not the kind of guy who is going to pitch with great feel and precision. He goes in there and tries to blow people away," Francona said. "He struck out the batter before Santiago, but he couldn't throw strikes to the last hitter."

Red Sox starter Jon Lester was also quick to defend Ramirez.

"It was tough to see the game end that way, but Ramon has had some great outings for us, and he'll have some more," Lester said. "He had a rough night tonight, but he wasn't the only one."

Rehab updates: Mike Cameron came out of Pawtucket's game Saturday night after going 0-for-2 with a walk in three plate appearances, but Francona said he didn't think it was because of a setback in Cameron's recovery from an abdominal strain.

"Obviously, I wasn't making phone calls about guys on rehab in the 12th inning of our game tonight, but I'm sure it isn't a problem," Francona said. "We told Cam to come out of the game as soon as he thought he had enough at-bats for the night."

Francona announced after the game that another injured outfielder, Jacoby Ellsbury, will begin a rehab assignment on Monday. Ellsbury is scheduled to play for Pawtucket on Monday afternoon and Double-A Portland on Tuesday night, then could rejoin Boston later in the week.

-- Clay Buchholz served up a career-high 117 pitches -- 80 of them strikes -- in squaring his record at 2-2. His previous high had been the 115 pitches he'd needed to no-hit the Orioles on Sept. 1, 2007, his second big-league start.

-- Ramon Ramirez, the lone reliever who didn't make it into Monday's 13-12 marathon, needed 11 pitches for a 1-2-3 ninth and his second career save -- first since Sept. 4, 2008, against the A's.

-- So glad you could make it, Fabio. The Sox, who had summoned Tuesday's scheduled Pawtucket starter Fabio Castro to provide some long insurance out of the pen, was advised he'd be returning to the PawSox. Boston will have lefty reliever Alan Embree in uniform for Wednesday's series finale.

-- The Sox have now played five straight one-run games, winning four. Seven of their last eight games have also been one-run affairs (6-1).

-- Tuesday marked Boston's first win of the year when scoring less than three runs (1-7).