Pheonix ? The Arizona Diamondbacks designated left-hander Randy Choate for assignment and optioned right-handed Dustin Nippert to Triple-A Tucson on Sunday.

They recalled reliever Jeff Bajaneru and infielder Alberto Callaspo from their top farm club.

Bajaneru was 4-2 with a 4.48 earned-run average with Tucson. Callaspo, 23, was fourth in the Pacific Coast League in hitting at .336 with 12 triples, five homers and 61 RBIs.

Choate’s departure leaves Arizona without a left-hander on its staff. He appeared in 21 games and had a 4.66 ERA.