Diamondbacks GM Josh Brynes and manager A.J. Hinch fired

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PHOENIX – The Diamondbacks have announced the firing of general manager Josh Byrnes and manager A.J. Hinch.

The official announcement was expected to be made during a news conference on Friday. The Diamondbacks have the third worst record in baseball.

Byrnes has a contract with the Diamondbacks through 2015, while Hinch, who was hired last May, has a contract through 2012. Hinch is the fourth Major League manager to be dismissed this season.

"Their dismissal is a significant decision, but one that we find necessary in order to achieve a direction of winning consistently on the field again. We have a number of talented players, but obviously see great room for improvement," said Ken Kendrick, Diamondbacks managing general partner.

The Diamondbacks have named Jerry Dipoto interim GM and Kirk Gibson interim coach.

Gibson will make his debut when the Diamondbacks open a three-game series against the Dodgers here at home. Gibson, who is possibly best known for hitting a clutch home run in Game 1 of the 1988 World Series, has never managed a team at the professional level.

Out of college, Gibson was drafted by both the Detroit Tigers and the then St. Louis Cardinals football team. He opted for baseball, playing for the Tigers and later the Los Angeles Dodgers. He signed a free agent with the Kansas City Royals and then the Pittsburgh Pirate before returning to the Tigers to finish out his playing career. He retired in August 1995.