PITTSBURGH (AP) Home plate umpire Chris Guccione left after the first inning of Wednesday night's game between Arizona and Pittsburgh after taking a foul tip to the mask.
The ball was hit by Pirates third baseman David Freese in the bottom of the inning.
Guccione walked off the field under his own power.
First base umpire Sean Barber took over behind the plate. Alfonso Marquez and crew chief Larry Vanover were left to handle the bases.
It marked the second time in three days that the plate umpire was forced to leave a game in Pittsburgh. During Monday's game between the Pirates and Colorado Rockies, Jeff Nelson left in the third inning after getting a foreign object lodged in his left eye.