Gwynn, the son of Hall of Famer Tony Gwynn, struggled at the plate in 2010, hitting .204 with three home runs and 20 RBIs. Over parts of five major league seasons with the Milwaukee Brewers and Padres, he has hit .244 with five home runs and 56 RBIs.
Hairston hit .210 with 10 homers and 36 RBIs. Antonelli missed the majority of the 2010 season after being placed on the 60-day disabled list April 30 with a broken wrist. Perdomo made one appearance for the Padres.