(AP) -- PHOENIX - Arizona Diamondbacks have fired manager A.J. Hinch and general manager Josh Byrnes.

The Diamondbacks announced the move Thursday night. Arizona is 31-48 and in last place in the NL West.

Hinch was hired May 7, 2009. Despite no managerial experience at any level, he was moved from the front office to manager following the firing of Bob Melvin. Hinch has two years remaining on his contract after this season.

Byrnes has 5½ years left on a deal that runs through 2015.

Bench coach Kirk Gibson, a former Detroit Tigers outfielder, will be the interim manager. Former major league pitcher Jerry DiPoto will take over the GM duties on an interim basis.

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