Secretariat is the greatest thoroughbred racing horse of all time. The triple crown winner in 1973, his records still stand in the Kentucky Derby (Mile & Quarter, 1:59.2) and Belmont Stakes, (Mile and one half, 2:24) a win of 31 lenghts. The Racing Form credits him with the Preakness record as well, but an official timing snafu cost him the record. This dynamo had the greatest 3 year run in the history of horse racing. The supreme runner in the Thoroughbred Pantheon non pareil.
Kentucky Derby winner Funny Cide with his trainer, Barclay Tagg in 2008. His second career as a stable pony only lasted for a year; now he's at the Hall of Champions in Kentucky Horse Park. (Catching Up with Funny Cide: Still a Fan Favorite in Retirement | Daily Racing Form)