Hermida, 29, is a career .257 hitter with 65 home runs and 250 RBIs in 632 big league games with the Marlins, Red Sox, A’s, Reds and Padres. He was Florida’s first-round draft pick – 11th overall – in 2002, spending his first eight professional seasons with the Marlins.
Hermida, who is expected to compete for an extra outfielder spot this spring, was limited by injuries to just 57 games last year with the Padres and their Triple-A affiliate, Tucson. He hasn’t played 100 games in the majors since 2009.
Santos, 31, spent nearly all of last season on the Triple-A level with Colorado and Detroit, batting a combined .310 with two homers and 30 RBIs in 61 games. He is a career .260 hitter in 121 games with the Orioles, Mets and Tigers, his best season coming in 2009, when he hit .260 with seven homers and 40 RBIs in 96 games for New York.