A guy who helped change the course of racing will be running a horse in the Grade 1, $750,000 Florida Derby on Saturday, but most of the fans in the crowd at Gulfstream Park would probably not be able to identify him. Yet whenever trainer Cam Gambolati meets strangers, be it on an airplane or some other social setting, and is asked what he does, inevitably there is a follow-up question: "Ever win the Kentucky Derby?"