Kingsbarns triumph in Racing Post Trophy at Doncaster gives Aidan O'Brien yet another Derby favourite The Galileo colt, ridden by Joseph O'Brien who was also confirmed yesterday as the Champion jockey in Ireland for the first time, cruised behind Trading Leather and Steeler, two of the toughest two-year-olds around, through the first three quarters of the race. But they could not take him much further and, knowing that Van Der Neer would come late under Richard Hughes, O'Brien had to push the button on the colt which was only having his second race. At that stage it looked like he would be highly impressive but he is still green, pricked his ears in front, drifted left and the jockey had to give him two hefty reminders to keep him going forward. The length and three quarter victory over Van Der Neer and Steeler may have looked "workmanlike" particularly when put beside Camelot's win in this race a year ago in what was little more than a piece of work but, given his very limited experience, it was probably a good bit better than that description. It certainly impressed the bookmakers most of whom make him the 4-1 favourite for Epsom although Ladbrokes were a more generous 8-1. Afterwards O'Brien was delighted with Kingsbarns and recalled a gallop in which he trounced his other Racing Post entries as a moment of truth. "After he won his Navan maiden," he said, "we intended leaving him alone. But after his next piece of work he was a bit fresh so, when the big exam for this race was being sat, we let him sit in on it and he passed the (six) others with flying colours. I'm a coward in that I'd run them all and hope one won but the lads made the decision to let him take his chance alone. He added: "He's only a baby. After he won at Navan (17 days ago) Joseph said he didn't even know how to canter back to the gate. He has an unbelievable cruise. He was stopping in front a bit today but you love to see horses travel like that in races. Joseph would have preferred to wait today but the race came to him so he had to go. You never know whether they'll stay the Derby trip but the big thing about him is that he's by Galileo. Kingsbarns was bred by O'Brien's wife Anne-Marie and sold privately to the "lads." "That's partly why he's so green," he added. He's never been to a sale and never been on a plane. It was quite a day for the O'Brien family who will leave for the Breeders" Cup in California early this week in the knowledge that Joseph is already Champion jockey for the first time at home although yesterday's prize-money was not enough to trouble the British Champion trainer elect, John Gosden. The Irish season continues until Sunday week but it will do so with its two main protagonists O'Brien and Pat Smullen, both of whom will be at Santa Anita. Smullen needed six winners at Leopardstown in O'Brien's absence on Saturday and, after winning the first two, he had Mrs O'Brien scanning the results. Defeat in the third race, however, meant an unlikely victory had become a physical impossibility.