1832: two-year-old season Dangerous made his first racecourse appearance at
Ascot in June. He started at odds of 5/2 and finished second of the three runners in a
Sweepstakes to a
filly named Minima. At
Stockbridge Racecourse later that month he started odds-on favourite for Sweepstakes but was easily beaten by Glaucus, who went on to be one of the season's leading colts. On his final start of the season he was unplaced behind Trepidation in a half-mile race at
Warwick on 5 September.
1833: three-year-old season Dangerous was not mentioned among the Derby contenders in the early part of the year and his participation in the race was only announced a day or two before the event, making him very much a "
dark horse". At Epsom on 23 May, Dangerous was offered at odds of 25/1 and 30/1 for the Derby in a field of twenty-five runners, with Glaucus starting the 3/1 favourite. According to the
Court Journal the crowds were the largest in memory, with hundreds of carriages, thousands of mounted spectators and an "innumerable phalanx" of pedestrians. The start of the race was delayed by "shameful confusion" as mounted officials struggled to clear the course of spectators and their carriages. Ridden by Jem Chapple, Dangerous was restrained at the back of the field in the early stages as Catalan, another of the outsiders set a very strong pace from Forester. Many of the runners were soon struggling, but Chapple was able to bring Dangerous through the field to join the leading group as the horses approached the turn into the straight. Two furlongs from the finish, Dangerous moved past Catalan closely followed by Connoisseur who was his only serious challenger. Dangerous appeared to be "full of running" In addition to the prize money of £3,725, Sadler was reported to have won "a large sum in bets". Later that season Dangerous claimed two more prizes without having to run in a competitive race. No other horses opposed him and he was allowed to
walk over in a Sweepstakes at Stockbridge on 27 July and a similar race at Winchester. The colt had actually sustained an injury after the Derby and would have been unable to take part in a serious race, but his trainer managed to keep his condition secret, enabling to collect both races without being tested. His injury problems made it impossible to keep Dangerous in training and he was retired at the end of the season. ==Assessment==