The Twins released Heller from his minor-league contract Sunday.
Heller was one of three veteran relievers with prior MLB experience whom the Twins cut loose Sunday, with Tyler Thornburg and Juan Minaya also receiving their walking papers. The 31-year-old right-hander spent most of the season on the injured list before debuting from Triple-A St. Paul on Aug. 5 and allowing five runs (four earned) over 1.2 innings across three appearances.