Aidan O’Brien was set to unveil one of the most expensive horses in his yard on Thursday. Galveston, a son of the legendary Frankel, fetched the biggest price paid for a yearling when he was knocked down for 2 million gns [£2.1m] at Tattersalls elite yearling sale last October. The colt sparked a fierce bidding battle, with MV Magnier and White Birch Farm ultimately outbidding heavyweights Godolphin and Juddmonte Farms to whisk him away for training at Ballydoyle. At the time Magnier said: “He is a lovely horse and from a very successful stud in Hascombe, which has bred very good horses in the past and are very good breeders. This is a well-bred horse, Frankel is flying and everyone liked him - he goes to Ballydoyle.” Galveston’s highly anticipated debut took place in a 7f maiden, which at 5.40pm was the last race on the card at Naas. He raced in the Sue Magnier silks but was jointly owned with Michael Tabor, Derrick Smith and White Birch’s Peter Brant. Ryan Moore had been booked for Galveston, who had taken the name of the Texas, USA, beach town. The name is also synonymous with a hit song by Glen Campbell, the US star whose best known tune, Rhinestone Cowboy, was the name of another Magnier horse, a jumper who won at Aintree and Punchestown, as well as finishing third in the Champion Hurdle at the 2004 Cheltenham Festival. Galveston faced 11 other unraced rivals in a bid to emulate Diego Velazquez, another Frankel who fetched 2.4m gns in 2022, and won on debut in August last year. He won for the fourth time when landing a Group 2 at Leopardstown on Saturday. But the race did not go to plan for the £2.1 million colt. Call Me Captain was a surprise winner as pricey purchase Galveston flopped on his debut in the Irish Stallion Farms EBF Maiden at Naas. Galveston cost his Coolmore owners two million guineas as he has a superb pedigree being by Frankel and out of a mare whose bloodline tracks back to Grade One winner Cannock Chase and Group One heroine Star Catcher. The colt was one of seven to line up for the seven-furlong event, starting as the 4-6 favourite under Ryan Moore for trainer Aidan O’Brien. Despite high expectations Galveston looked in trouble several furlongs from home and could not land a blow, fading to finish last of all as Natalia Lupini’s Call Me Captain struck at 18-1 under Dylan Browne McMonagle, with Johnny Murtagh’s 40-1 chance Reyenzi running a remarkable race in second having been very slowly away. Lupini’s partner Craig Bryson said: “He’s a horse we liked a lot at home. Paddy Turley bought him and he liked him as well. He was just ready to start today and showed his greenness down the back. We hoped he’d run a nice race but coming to a maiden like this you are only hoping. He showed a wee bit of class there today to get to the front and get the job done nicely. He’s a nice horse going forward. If he had come here today and been placed we would have been delighted, to win is brilliant. We’ll see how he is after that. He could possibly have one more run but he’s probably a middle distance horse for next year, although he’s not slow either as that was seven today. He’s going to progress into a nice horse. He’s a massive big horse.”