J. O. Tobin (March 28, 1974 – May 22, 1994) was an American-bred thoroughbred racehorse. As a two-year-old, he was sent to Europe, where he won his first three races, including the Richmond Stakes and Champagne Stakes, and was the highest-rated juvenile of the season in Britain. In the following year, he was transferred to the United States, where he recorded his most famous victory as he ended the undefeated streak of the Triple Crown winner Seattle Slew with a win in the Swaps Stakes. In the following year, he won a succession of major stakes races and was named American Champion Sprint Horse. Background J. O. Tobin was an "impressive-looking" brown colt, with a small white star bred in Maryland by his owner, George A. Pope Jr. He was sired by Never Bend, the American Champion Two-Year-Old Colt of 1962 who went on to become a very successful breeding stallion whose other progeny included Mill Reef, Riverman, and Triple Bend. J. O. Tobin's dam, Hill Shade, was an American-bred mare who raced in Europe, winning the Nassau Stakes and Sun Chariot Stakes in 1968 and being awarded a rating of 116 by Timeform. Before foaling J.O. Tobin, she had produced an outstanding performer in Mysterious, winner of the 1000 Guineas and Oaks Stakes in 1973. Pope initially sent his colt to race in England, where he was trained by Noel Murless in Newmarket, Suffolk. Racing career 1976: two-year-old season J.O. Tobin began his racing career with a win over Chain of Reasoning in the Fulbourn Maiden Stakes over six furlongs at Newmarket Racecourse on 8 July. Three weeks later, the colt was moved up in class for the Group Two Richmond Stakes at Goodwood Racecourse. Ridden by Lester Piggott, he started the 8/11 favourite and won from Priors Walk and Tachypous, a colt who later won the Middle Park Stakes. J.O. Tobin's next race was the Champagne Stakes at Doncaster Racecourse in September, for which he was made the 4/9 favourite. In what was described by Timeform as a "breathtaking" performance, Piggott sat motionless on the colt until the final furlong, at which point J.O. Tobin accelerated clear of his rivals to win by four lengths from the filly Durtal. The form of the race was subsequently boosted when Durtal won the Cheveley Park Stakes and was rated the best two-year-old filly of the year in Britain. On his