Authorized (horse) going, and Authorized was ridden for the first time by Frankie Dettori. He won at odds of 25 to 1, by one and three quarter lengths from Charlie Farnsbarns. The odds-on favourite Eagle Mountain finished fourth. Authorized was quoted immediately after the race at 16 to 1 for the 2007 Epsom Derby but this was soon cut to 10 to 1. Authorized’s first run as a three-year-old came in the ten furlong Dante Stakes at York Racecourse on 17 May. Ridden by Frankie Dettori, Authorized was sent off 10 to 11 favourite and won by four lengths from Raincoat. It
1984 Epsom Derby finished second by a short head. The colt's win was a first success in the race for owner, trainer and jockey. At the age of 27, David O'Brien was one of the youngest men to have trained a Derby winner. Race result Further details of the winner, Secreto: Notable runs by the future Derby participants as two-year-olds in 1983: Early-season appearances in 1984 and trial races prior to running in the Derby: Group 1 / Grade I victories after running in the Derby. 1984 Epsom Derby The 1984 Epsom Derby was the 205th annual running of the Derby horse race.