The move was made before Tuesday night's game against Tampa Bay.
Left-hander Steve Garrison was recalled from Double-A Trenton to replace Mitre.
Also, Rafael Soriano started a minor league rehab assignment with Class A Tampa. The right-handed reliever, who allowed two runs and two hits over 1 1/3 innings in Tuesday night's game against Jupiter, has been out with right elbow inflammation since May 14.
Corner infielder Eric Chavez was the DH in the same game as Soriano. It was his first game action since going on the disabled list May 6 due to a broken left foot.