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6/23/2013 8:41 P.M. ET

Rosario delivering clutch relief for Giants

SAN FRANCISCO -- In the 10 days since reliever Sandy Rosario rejoined the Giants bullpen, he has already impressed manager Bruce Bochy.

"He saved us with the job he did," said Bochy of the right-hander, who earned the victory Saturday in San Francisco's 2-1 victory in 11 innings.

In 1 2/3 scoreless innings, Rosario struck out three Marlins and preserved the tie long enough for Hector Sanchez's walk-off bloop single.

"He only had one day off and that's a lot of pitches," Bochy said.

Rosario has thrown a combined 6 2/3 innings of relief in three appearances during the current Giants homestand and has not shied away from emotional reactions to some of the high-leverage outs he has recorded.

"You haven't seen anything yet," Rosario said Saturday. "I'm trying to control myself, but the things I do are crazy."

This is Rosario's second stint in the San Francisco bullpen in 2013. He was optioned to Triple-A Fresno on May 28 to make room for starting pitcher Mike Kickham after Ryan Vogelsong was placed on the disabled list. Rosario has a 2.84 ERA in nine games this season.

Gaudin questionable to make next start

SAN FRANCISCO -- Giants pitcher Chad Gaudin's availability to start Tuesday in Los Angeles is still unknown, manager Bruce Bochy said prior to the start of Sunday's series finale against the Marlins.

Gaudin's scheduled bullpen session between starts was supposed to be Sunday, but Bochy said he and head athletic trainer Dave Groeschner had not yet determined if Gaudin would complete it. He did not throw Saturday as scheduled after a line drive struck him in the right upper forearm Thursday, a play that forced Gaudin to leave the game.

"That's what we're talking about right now between how he feels and what the best thing to do is," Bochy said. "He took a good shot to the arm and he was a little sorer than we expected yesterday."

Bochy said left-hander Mike Kickham, currently with Triple-A Fresno, would start in Gaudin's place if needed Tuesday, as it is his scheduled day to start. Kickham made his Major League debut May 28 in Oakland, when the A's roughed him up for four runs on four hits and four walks in 2 1/3 innings.

Bochy did not rule out the possibility that Gaudin, who is 2-0 with a 3.38 ERA as a starter this season, could start Tuesday even if he does not throw his bullpen session Sunday.

"There are times when [pitchers] don't take a bullpen," Bochy said. "Some pitchers as they get into the season don't throw a bullpen."

Giants hoping for boost as Sandoval returns Monday

SAN FRANCISCO -- After concluding a two-game rehab assignment with four hits (two home runs) Saturday, Giants third baseman Pablo Sandoval will be activated Monday in Los Angeles, manager Bruce Bochy said.

Sandoval, out since June 8 with a strained tendon in his left foot, will return to a Giants lineup desperate for offense. Prior to the injury, Sandoval was hitting .289 with eight home runs and 37 RBIs.

"It certainly should do something for the club," said Bochy, whose team has lost six of nine games. "We need a lift right now. He's a big presence in the lineup and hopefully it will keep guys from trying to do too much."

In a corresponding move, the Giants optioned infielder Nick Noonan to Triple-A Fresno.

"He's played well, has options and just needs to play every day," Bochy said.

Injured outfielder Angel Pagan said Sunday that he will "almost for sure" receive a second opinion on his aggravated left hamstring in Los Angeles on Monday.

"I want to get this taken care of as soon as possible," said Pagan, who suffered a slight hamstring tear in his first rehab appearance with Class A San Jose on Thursday. He has been absent from San Francisco's lineup with a strained left hamstring since May 25.

One of the outfielders used to fill Pagan's absence is Andres Torres, who returned to the lineup Sunday after bruising his right knee Friday.

Andrew Owens is an associate reporter for MLB.com. Follow him on Twitter @OwensAndrew. This story was not subject to the approval of Major League Baseball or its clubs.