Hawk Mountain was cut to 20/1 for the Betfred Derby by Paddy Power and Sky Bet after winning the Qatar Racing & Equestrian Club Beresford Stakes at the Curragh.
The regally-bred colt, a son of the late Wootton Bassett and Hydrangea, has progressed with each of his three starts to date and was taken to the front by Ronan Whelan.
The 5/4 favourite begain to increase tempo from over two furlongs out and soon had his rivals at full stretch.
Geryon (9/4) tried to close him down but the leader wasn’t for catching and drew clear again inside the final furlong to win by three-and-a-quarter lengths.
O'Brien also saddled the first and third in the Goffs Million with Dorset staying on strongly to beat August George by a length-and-a-quarter with Composing a further half length away.
More from Sporting Life
Safer gambling
We are committed in our support of safer gambling. Recommended bets are advised to over-18s and we strongly encourage readers to wager only what they can afford to lose.
If you are concerned about your gambling, please call the National Gambling Helpline / GamCare on 0808 8020 133.
Further support and information can be found at begambleaware.org and gamblingtherapy.org.