After grounding out in a 4 – 1 loss to the Dodgers, Padres C Benito Santiago throws his batting helmet in disgust. The helmet bounces into the dugout, where it strikes pitching coach Mike Roarke in the head before ricocheting over to bean coach Greg Riddoch, giving him a concussion. Santiago is fined $300.

On July 2, 1991 After grounding out in a 4 – 1 loss to the Dodgers, Padres C Benito Santiago throws his batting helmet in disgust. The helmet bounces into the dugout, where it strikes pitching coach Mike Roarke in the head before ricocheting over to bean coach Greg Riddoch, giving him a concussion. Santiago is fined $300.

 

Source:

Baseball Reference July 2