He was popular in the United States, and appeared with Stanley Dancer on The Ed Sullivan Show as the "million dollar horse".
In a six-horse field at the 1961 International Trot at Roosevelt Raceway, Dancer drove Su Mac Lad, finishing in a time of 2:34.4 in driving rain and a sloppy track in front of 28,105 racing fans, with the French horse Kracovie in second by what The New York Times called "the smallest of noses" with American horse Tie Silk in third.
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