The 31-year-old left-handed hitter has only been caught stealing once in 33 attempts throughout his Major League career, a stretch that includes five stolen bases during the postseason.
Originally a fifth-round Draft pick by the Phillies in 2006, Berry spent most of last season with the Red Sox's Triple-A affiliate, batting .228/.329/.287 with four homers and 35 steals in 106 games. He's a .265/.336/.368 hitter in 125 Major League games.
Berry is a natural center fielder who can also play the corners. He'll compete with the likes of Todd Cunningham, Rafael Ortega and Efren Navarro for a spot off the bench.