The Diamondbacks clean house, firing general manager Josh Byrnes and manager A.J. Hinch in one fell swoop. Bench coach Kirk Gibson will serve as interim manager, while team Vice-President Jerry DiPoto will take over GM duties. The Diamondbacks are last in the NL West with a record of 31-48, the third worst in the major leagues.

On july 1, 2010 The Diamondbacks clean house, firing general manager Josh Byrnes and manager A.J. Hinch in one fell swoop. Bench coach Kirk Gibson will serve as interim manager, while team Vice-President Jerry DiPoto will take over GM duties. The Diamondbacks are last in the NL West with a record of 31-48, the third worst in the major leagues.

Source
Baseball Reference July 1