By Rory Carroll (Reuters) -Long-shot Rich Strike stormed to victory at the 148th Kentucky Derby at Churchill Downs in Louisville on Saturday in one of the biggest upsets in the history of the race. The chestnut colt, who went off at 80-1 odds, pulled into the lead down the stretch and crossed the finish line ahead of the favorite Epicenter, who was second, and Zandon, who was third. Rich Strike only entered into the 20-horse race when Ethereal Road was scratched on Friday morning. The unlikely victory was the first Kentucky Derby win for trainer and Kentucky native Eric Reed. “I fell down in t…