The San Francisco Giants will send ace Madison Bumgarner to the mound Sunday afternoon as they try to complete a four-game sweep of the Arizona Diamondbacks in Phoenix. The Giants have gone from one game behind the D-backs to two up on them in the National League wild-card chase. The D-backs have lost four straight games overall and are 4 1/2 games back of the second wild-card spot, with four contenders ahead of them.