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5/21/2013 2:19 P.M. ET

Vogelsong, Casilla to DL; Pill, Rosario up

Starter to miss 6-8 weeks with fractured finger, while reliever has balky knee

SAN FRANCISCO -- The likely timetable for Ryan Vogelsong's recovery from his fractured pitching hand grew to six to eight weeks, Giants manager Bruce Bochy said Tuesday after the right-hander underwent surgery at Stanford Hospital.

"It could be a little bit sooner," Bochy said, clinging to hope for Vogelsong to heal more quickly. Vogelsong sustained two fractures and a dislocated joint in his right pinkie when he was hit by a pitch from Washington's Craig Stammen on Monday night.

Bochy said that Vogelsong visited the Giants clubhouse after his surgery, which was performed by Dr. Tim McAdams.

"He wasn't here very long," Bochy said. "He was pretty tired."

Vogelsong and right-hander Santiago Casilla went on the 15-day disabled list and were replaced on the active roster by right-hander Sandy Rosario and first baseman Brett Pill, who were recalled from Triple-A Fresno.

Casilla pitched a scoreless eighth inning in Monday's 8-0 victory over Washington, but aggravated a right knee injury caused by a cyst. Bochy said that the setup man will consult a specialist Wednesday to receive advice on treating his knee. Casilla has tried wearing a brace but still felt uncomfortable.

"What happens is you start throwing with all arm [and risk injury]," Bochy said, explaining Casilla's predicament. Bochy did not rule out surgery as an option for Casilla, who was 3-2 with a 1.89 ERA and one save in 21 games. Casilla signed a three-year, $15 million contract during the offseason.

The moves trimmed the pitching staff to 12. The Giants may opt to add another pitcher closer to next Tuesday, when they'll first need a fifth starter to replace Vogelsong.

Pill went 2-for-6, both hits doubles, in a recent stint with the Giants. He has tattooed Triple-A pitching, batting .365 with nine home runs and 47 RBIs in 35 games.

Rosario picked up his first Major League victory April 30 at Arizona in his only appearance during a four-day callup. Bochy said that Rosario's capability for pitching multiple innings enhanced his value.

Giants mulling replacement for Vogelsong

SAN FRANCISCO -- Giants manager Bruce Bochy said that he and the club's braintrust are "weighing all the options" regarding who will replace the injured Ryan Vogelsong in the starting rotation.

Currently, there's no urgency to name a fill-in for Vogelsong, who sustained two fractures and a dislocated joint in his right pinkie when Washington's Craig Stammen hit him with a pitch that he swung at Monday night. Due to Thursday's scheduled off-day, the Giants won't need a fifth starter until next Tuesday's Interleague game at Oakland.

The simplest move would be to move Chad Gaudin from the bullpen to the rotation. The right-hander has made 75 Major League starts and possesses more durability than the average reliever, having pitched three innings or more twice and working between two and three innings seven times. He entered Tuesday with an 0-1 record and a 2.10 ERA in 14 appearances.

Three candidates exist at Triple-A Fresno: Mike Kickham (2-4, 4.72 ERA), Chris Heston (5-3, 5.59) and Shane Loux (4-1, 3.68).

Ranked 12th by MLB.com on the list of top Giants prospects, the 24-year-old Kickham has won his last two starts, yielding two earned runs in 11 innings during that span. In 47 2/3 innings, the left-hander has struck out 50 batters but has walked 19.

Heston, San Francisco's No. 8 prospect according to MLB.com, has 50 strikeouts in 56 1/3 innings. Two starts ago he surrendered three hits in seven shutout innings against New Orleans but was roughed up Tuesday, when Oklahoma City tagged him for five runs and seven hits in 5 2/3 innings.

Loux, who's beginning his 17th professional season, was primarily a starter in Triple-A from 2010-11 before returning to the bullpen last year. His 2012 campaign included a 19-game relief stint with San Francisco, during which he went 1-0 with a 4.97 ERA.

Former Giants star Clark to rep team at Draft

SAN FRANCISCO -- Fittingly, one of the top Draft picks in Giants history will help represent the club at next month's Major League Baseball 2013 First-Year Player Draft.

Former first baseman Will Clark will be the Giants' standard-bearer at MLB Network's Studio 42 in Secaucus, N.J., where the Draft will be conducted June 6. Clark, who currently serves as a Giants community ambassador, will be joined by Tony Siegle, San Francisco's senior advisor of baseball operations.

The Giants made Clark the second choice overall out of Mississippi State University in the 1985 draft. He proceeded to make five All-Star teams in his eight years as a Giant while batting .299 with 176 home runs in 1,160 games for San Francisco.

2013 Draft Central

Siegle has held front-office positions with eight different organizations spanning five decades and has worked for the Giants on three separate occasions. He works with general manager Brian Sabean and the baseball operations office in waiver and rules compliance, contract negotiations, salary arbitration issues and trade discussions.

The 2013 First-Year Player Draft will take place June 6-8, beginning with the Draft preview show on MLB.com and MLB Network on Thursday, June 6, at 3 p.m. PT. Live Draft coverage from MLB Network's Studio 42 begins at 4 p.m., with the top 73 picks being streamed on MLB.com and broadcast on MLB Network. Rounds 3-10 will be streamed live on MLB.com on June 7, beginning with a preview show at 9:30 a.m. PT, and Rounds 11-40 will be streamed live on MLB.com on June 8, starting at 10 a.m.

MLB.com's coverage includes Draft Central, the Top 100 Draft Prospects list and Draft Tracker, a live interactive application that includes a searchable database of Draft-eligible players. You can also keep up to date by following @MLBDraft on Twitter. And get into the Draft conversation by tagging your tweets with #mlbdraft.

Chris Haft is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.