Vogelsong, 36, has a career 4.52 ERA over his nine year big league career. In 2013, Vogelsong went 4-6 with a 5.73 ERA and a 1.56 WHIP in 19 starts. He was limited in 2013 after spending time on DL with a broken finger. Upon returning, Vogelsong posted a 2-2 record with a very respectful 4.55 ERA. Before that, Vogelsong went 2-4 with an ugly 7.19 ERA. Hitters hit .318 against him before the injury. The Giants went 9-10 in Vogelsong's 19 starts overall. Vogelsong's best year was in 2010, when he went 13-7 with a 2.71 ERA. That was his breakout year.
The Giants as a team had the 24th worst ERA in 2013, with a 4.37 mark. Re-signing Vogelsong may come at a slight risk, but he could definitely could be good for them. With hitters having a .320 BABIP against him, Vogelsong may have just had an unlucky year. It's possible that he could comeback with a strong 2014 campaign.