DENVER, CO - JULY 27: Matt Chapman #26 of the Oakland Athletics warms up in the on deck circle before batting against the Colorado Rockies during interleague play at Coors Field on July 27, 2018 in Denver, Colorado. (Photo by Dustin Bradford/Getty Images)
lessDENVER, CO - JULY 27: Matt Chapman #26 of the Oakland Athletics warms up in the on deck circle before batting against the Colorado Rockies during interleague play at Coors Field on July 27, 2018 in Denver,
... more Photo: Dustin Bradford / Getty ImagesA’s third baseman Matt Chapman underwent left shoulder surgery Friday, the Gold Glover’s second operation of the offseason.