John Baker has had a much greater impact on the Cubs organization since retiring than he ever did as a backup catcher, though he did become a cult hero for his exploits on July 29, 2014. That was the night the backup catcher got the win, as Baker came on to pitch the top of the 16th against the Rockies. After holding them scoreless, he walked and eventually came home to score the winning run on a sacrifice fly. Epic.
Baker retired after that season but rejoined the Cubs as a mental skills coordinator and is currently their MLB head of applied mental skills.