The Arizona Diamondbacks fired both general manager Josh Byrnes and manager A.J. Hinch on Thursday night, major-league sources have confirmed to CBSSports.com.
Kirk Gibson, bench coach to Hinch and Bob Melvin in Arizona over the past few seasons, will be named as interim manager and will guide the club Friday when the Diamondbacks open a weekend series at home against the Los Angeles Dodgers. Jerry DiPoto, who had been Arizona's vice-president for player personnel, will assume the interim GM duties.
USAToday first reported that Byrnes and Hinch are out.
In the midst of a miserably disappointing season, the Diamondbacks are last in the NL West at 31-48, trailing San Diego by 15 1/2 games.
The Diamondbacks hired Hinch last May 7, making him the youngest manager in the game at 34. He had no managerial experience when they named him to replace Bob Melvin, yet the Diamondbacks awarded him a contract through 2012.
Byrnes, meantime, is under contract through 2015.
Diamondbacks owner Ken Kendrick and club president Derrick Hall promised major changes last month, and these are the first of what is expected to be a complete makeover of an organization in utter disarray.
"These decisions come as a first and major step in our thorough evaluation of our team," Hall said in a statement released by the Diamondbacks late Thursday night. "We have all been disappointed in the results over the last few years, and we have come to the conclusion that a change in the leadership of our baseball operations staff is necessary at this time.
"This franchise has enjoyed tremendous success over the years and we want to get back to our winning ways. The loyal staff of this organization, as well as all of our fans, hopes for and deserves better results on the field."