Gillaspie broke out last year, batting .282/.336/.416 with seven homers and 57 RBIs in 130 games, but he's had a rough 2015 season at the plate and in the field. The 28-year-old has committed 12 errors on defense and his slash line has dropped to .237/.276/.364 in 58 games.
Gillaspie, who can also play first base, began the year splitting time with Gordon Beckham at third base, then lost his job to rookie Tyler Saladino and was designated for assignment on Sunday.
The acquisition of Gillaspie likely means Kyle Kubitza, whom the Angels hope will be ready for an everyday role at third base in 2016, will return to Triple-A.