Acquired from Minnesota this past August, Valencia appeared in 44 total games in 2012. He struggled, posting a .188/.199/.299 batting line in 161 plate appearances for the Red Sox and Twins. However, in 2011, he hit 15 home runs and posted a .246/.294/.383 as Minnesota's starting third baseman.
Mahoney debuted with the Orioles this past season, appearing in two games. In 536 plate appearances at Triple-A, the 25-year-old posted a .265/.319/.389 batting line.