SCOTTSDALE, Ariz. -- Ryan Vogelsong's strained back left the Giants with few reinforcements in case another starting pitcher is sidelined. But some depth does exist.
The most experienced starter among San Francisco's non-roster invitees is right-hander Ramon Ortiz, who's 86-84 with a 4.93 ERA in 11 Major League seasons. Ortiz has started in 214 of his 296 big league appearances. Last year, he finished 1-2 with a 4.86 ERA in 22 games for the Chicago Cubs and went 6-3, 4.26 in 16 starts at Triple-A Iowa.
Left-hander Brian Burres, who began his professional career with the Giants, also is in camp as a non-roster invitee. Burres owns an 18-25 record with a 5.75 ERA in 105 games (56 starts) spanning parts of six Major League seasons. He's 60-47 with a 4.06 ERA in 11 years in the Minors.
Right-hander Shane Loux compiled a 3-7 mark with a 6.14 ERA in parts of four seasons with Detroit (2002-03) and the Angels (2008-09). He has made 13 starts in 39 Major League appearances. Loux finished 8-12, 4.67 in 28 games with Triple-A Fresno last year.
Left-hander Matt Yourkin, who shared Fresno's team lead in victories last season by finishing 10-8 with a 4.69 ERA, would be considered another option. The Napa, Calif., native is 33-36 with a 4.19 ERA in eight Minor League seasons.
The Giants are hoping that Vogelsong, who could be sidelined from 10 days to two weeks, will recover quickly. He received complete, if unwanted, rest Monday when he felt ill and was sent home.
"Vogelsong is getting done with all his issues early in camp," manager Bruce Bochy said jokingly.
Left-hander Eric Surkamp is the leading candidate to start if Vogelsong is shelved for a prolonged period.