Giants center fielder Angel Pagan will have surgery on Tuesday to repair his hamstring, and he is expected to be sidelined for 10 to 12 weeks, multiple media outlets reported Monday.
Twelve weeks from Tuesday would place Pagan's return on Sept. 17, which means Pagan could be out the rest of the regular season.
Manager Bruce Bochy told reporters that, if all went well, Pagan could return sooner.
The surgery, to be performed by Los Angeles Dodgers orthopedist Dr. Neal El Attrache, will involve having a tendon at the bottom of his left hamstring repaired.
Pagan has not played since May 25, when he suffered the initial injury.
He went on a rehab assignment last week, but reinjured his hamstring while running out a grounder over the weekend. An MRI on Friday indicated Pagan has a small tear in the tendon.
"It's a loss, there's no getting around it," Bochy told reporters. "When you lose your leadoff hitter, the guy who led off for you all the way through the World Series, and played a significant role helping you win a World Series, there's no question it's a loss."
Posey falls behind Molina: St. Louis Cardinals catcher Yadier Molina has overtaken Giants catcher Buster Posey in the lastest update on National League All-Star Game voting.
Molina has 3,596,858 votes, while Posey checks in 3,506,402. Molina and Posey are the top two vote-getters overall in the National League.
Three other Giants are currently second in their position as well.
Second baseman Marco Scutaro trails the Cincinnati Reds' Brandon Phillips by about 300,000 votes, shortstop Brandon Crawford is more than a million votes behind the Colorado Rockies' Troy Tulowitzki and third baseman Pablo Sandoval is breathing down the New York Mets' David Wright, trailing by roughly 125,000 votes.
All-Star rosters will be announced July 6.
Kickham to start today: Right-hander Chad Gaudin was placed on the 15-day DL Monday because of a bruised elbow and left-hander Mike Kickham was recalled from Triple-A Fresno and will start in Gaudin's place today. Also Monday, the Giants recalled reliever George Kontos from Triple-A Fresno and optioned right-hander Jean Machi to their Pacific Coast League club.