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DENVER, CO - SEPTEMBER 21: Starting pitcher Jon Gray #55 of the Colorado Rockies delivers against the Pittsburgh Pirates at Coors Field on September 21, 2015 in Denver, Colorado. The Pirates defeated the Rockies 9-3. (Photo by Doug Pensinger/Getty Images)

DENVER, CO - SEPTEMBER 21:  Starting pitcher Jon Gray #55 of the Colorado Rockies delivers against the Pittsburgh Pirates at Coors Field on September 21, 2015 in Denver, Colorado. The Pirates defeated the Rockies 9-3.  (Photo by Doug Pensinger/Getty Images)