One Cool Cat, (foaled 26 March 2001) was an American-bred, Irish-trained Thoroughbred racehorse and sire. Background One Cool Cat was a bay horse bred in Kentucky by Winstar Farm. He was sired by Storm Cat out of the Mr. Prospector mare, Tacha. At the 2002 Keeneland Sales he was purchased by Demi O'Byrne for $3.1-million on behalf of John Magnier's Coolmore organization. During his racing career he was owned by Sue Magnier and Michael Tabor and was trained at Ballydoyle by Aidan O'Brien. Racing career 2003: two-year-old season One Cool Cat lost on his debut start, finishing 4th in a maiden race at the Curragh. He was soon on the winning trail with a victory in a maiden race at York Racecourse six weeks later. The Anglesey Stakes was his next race, and was the second in a string of four consecutive wins, following up in the Phoenix Stakes and National Stakes. Aidan O'Brien had been so impressed with his work at home and also on the racetrack, that he joked once, "I think I'll move him in beside me and knock a door in the bedroom to put him up for the winter!" For his performance in the 2003 racing season One Cool Cat was named Cartier Champion Two-year-old Colt. 2004: three-year-old season One Cool Cat was sent off favourite for the 2,000 Guineas with new stable jockey Jamie Spencer on board. However, he never struck a blow and finished 13th of 14, over 51 lengths behind the winner Haafhd. It was found afterwards that he had an irregular heartbeat, the likely reason for his poor showing. He was sent out in a Group 3 at the Curragh ten weeks later, odds-on favourite, but again he never threatened over a mile, and finished 5th, 6 lengths behind the winner. A return to 6 furlongs was a victorious one, beating The Kiddykid by a length in the Group 3 Phoenix Sprint Stakes, again at the Curragh, at the start of August. Just eleven days later, he started as favourite for the Group 1 Nunthorpe Stakes at York Racecourse, finishing 3rd, although may well have won with a better run. The Group 1 Haydock Sprint Cup was next on the agenda 2 weeks later, but the 3rd run in such quick succession was seemingly too much for him, and finished 6th, 3 lengths behind the winner Tante Rose. Stud record One