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5/26/2013 9:54 P.M. ET

Casilla set for surgery at Stanford; no timeline set

SAN FRANCISCO -- Right-hander Santiago Casilla will undergo surgery to remove a cyst in his right tibia.

The Giants are hoping it takes place as soon as possible, and it is scheduled to take place at Stanford with an orthopedic oncologist, according to head trainer Dave Groeschner. The team's medical staff will wait for the outcome of the surgery before projecting Casilla's time for recovery, Groeschner said.

Groeschner added that Cassilla missed a small amount of time last season because of the problem, but he still pitched afterward, including the postseason.

The cyst is "getting bigger" and "causes him discomfort," Groeschner said, adding that Casilla is fine walking around, but cannot push off the mound like he needs to.

The 32-year-old Casilla, who signed a three-year, $15 million contract extension during the offseason, was 3-2 with a 1.89 ERA, one save and a .167 batting average against in 21 games before the Giants placed him on the 15-day disabled list Tuesday.

Giants tab prospect Kickham for Vogelsong's start

SAN FRANCISCO -- And the filling-in-for-Ryan-Vogelsong winner is ... Michael Kickham.

The 24-year-old lefty will be called up from Triple-A Fresno to make Tuesday's start against Oakland, manager Bruce Bochy announced after Sunday's 7-3 win.

"He's been throwing the ball as well as anybody down there -- better, really," Bochy said of the club's 12th-ranked prospect, according to MLB.com.

Kickham takes Vogelsong's spot in the rotation after Vogelsong went on the 15-day disabled list May 21 because of a fractured right hand. The Giants do not plan to make the roster move until they have to Tuesday.

Bochy said he's impressed with how Kickham has pitched lately. In his past five starts, he's allowed six earned runs in 31 1/3 innings with 29 strikeouts and nine walks. In 10 starts with the Grizzlies, Kickham is 3-4 with a 4.33 ERA.

The Giants will be able to keep the bullpen as is, with rotation candidate Chad Gaudin staying in the 'pen.

"He's a young kid that just settled in at Triple-A," Bochy said of Kickham. "We need some help here."

Pagan's left hamstring holds him out of lineup for finale

SAN FRANCISCO -- Not only did Angel Pagan hit the Giants' first walk-off inside-the-park home run in 83 years Saturday, but, it turns out, he did it with a left hamstring problem.

The issue, which popped up earlier in the 6-5 win while fielding a ball in center field, was significant enough that Pagan sat during Sunday's series finale against the Rockies.

Whereas Pagan's right hamstring injury earlier this season affected his hitting, this issue affects his running, and it did even during his incredible feat Saturday.

"If you noticed, between second and third, I stumbled," Pagan said. "But when you play with heart, you don't think about the pain. If you blow out your leg, you blow out your leg."

Pagan said he feels some discomfort, and although he could have played Sunday, he does not want to push it.

Meanwhile, he has enjoyed doing something he rarely does: watching replays. He only watched Saturday's game-winning play because of his family.

"My wife was so proud," he said, adding that his children "were amazed with what daddy did."

Worth noting

• Buster Posey went 2-for-4 with a solo homer run and two runs Sunday, stretching his hitting streak to 10 games.

• Saturday's 6-5 comeback win in the 10th was the first of the Giants' 4,408 games in San Francisco in which they won by overcoming both a deficit of at least four runs and a deficit in extra innings.

Willie Bans is a contributor to MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.