O'Brien finalises Derby team Champion Irish trainer Aidan O'Brien will rely upon Derrinstown Stud Derby Trial winner Battle Of Marengo and Mars as he bids to win the Investec Derby for a fourth time. The Ballydoyle handler said his son, Joseph, was "short enough odds" to ride Battle Of Marengo in the Derby, and confirmed only 2000 Guineas sixth Mars alongside him, with plans to be made for the rest. O'Brien explained that plans for his Derby team had yet to be made final. "It's all a little bit up in the air at the moment, but they are all in good shape so far," he said. "Obviously Battle Of Marengo was always going to stay home for the two trials and the other horses were going to go for the trials elsewhere. "We said after Newmarket that Mars would go for the Derby and he probably will end up going there as well. Obviously we have Ruler Of The World and Magician, and there are a few other options apart from that. "We'll probably get towards the end of the week when they are doing their work, but they've all been together and done their half-speeds "Joseph has always ridden Battle Of Marengo, I think he's probably short enough odds to ride him. Mars will go if everything else goes well with him between now and then. Whatever else goes, we're not 100% sure." Although jockey bookings have yet to be firmed up, O'Brien expects that to be a straight forward issue once running plans have been confirmed. "Obviously there's Seamie (Heffernan) and Colm (O'Donoghue) and Ryan (Moore) has also ridden for us. I don't think that's going to be a problem. All those things usually fall into place."
