1 National Stakes over seven furlongs at the Curragh on 20 September Mus-If, with Kinane in the saddle started the 8/1 third choice in the betting behind the Acomb Stakes runner-up Coliseum and Globe Theatre. None of the other six runners had contested a Group race, making the field appear to be a poor one by Group 1 standards. The best horse in the race was probably the British-trained Royal Rebel, who later won two editions of the Ascot Gold Cup. Wearing blinkers, Mus-If went to the front from the start, opened up a clear advantage approaching the last quarter mile and held off the late challenge of Coliseum to win by a neck. 1999: three-year-old season Mus-if began his second season in the Listed 2000 Guineas Trial Stakes over one mile at Leopardstown on 18 April. He took the lead in the straight but was caught in the final strides and was beaten a head by the Aidan O'Brien-trained favourite Saffron Walden. In the Irish 2000 Guineas five week later at the Curragh he went to the front two furlongs out but was overtaken entering the final furlong and came home fourth behind Saffron Walden, Enrique and Orpen with the 2000 Guineas winner Island Sands in fifth. The colt was the dropped in class for the International Stakes over nine furlongs at the Curragh in June but finished last of the five runners behind the Henry Cecil-tranied favourite Great Dane. On his final European start, Mus-If was sent to Germany to contest the Group 2 Grosse Europcar-Meile at Cologne-Weidenpesch Racecourse on 25 September. He was made the 3/5 favourite but came home fourth behind the four-year-old El Divino. 2001: five-year-old season At the end of his European racing career Mus-If was sent to the United States where he was "mistakenly" gelded. He re-entered training in 2001 and joined the stable of Neil Drysdale in California. He raced twice at Santa Anita Park, finishing second in a claiming race in February and fourth in a similar event in March. 2002: six-year-old season In 2002 Mus-If moved to the training stable of Michael Pino and began his campaign in claiming races at Fair Grounds Race Course. After finishing fourth and third on his first two starts he recorded his first success for three and a half years when taking a claimer on 11 March. After winning a similar event at Keeneland