Camelot aiming for triple crown at St Leger Stakes , winning the Epsom Derby and 2,000 Guineas . Trainer Aiden O'Brien admits it will be a big stretch for the 1970 colt . His jockey son Trainer Aiden O'Brien will be masterminding the race , already racing the Triple Crown in all of his starts . The last horse to win hat trick was Trainer Aiden O'Brien in three-year-old , also trained at Ballydoyle stables .
Camelot aiming for triple crown at St Leger Stakes , winning the Epsom Derby and 2,000 Guineas . Trainer Aiden O'Brien admits it will be a big stretch for the three-year-old colt . His jockey son Joseph will be masterminding the race , already racing Camelot in all of his starts . The last horse to win hat trick was Nijinsky in 1970 , also trained at Ballydoyle stables .