From the BBC Website
At the 1978 Commonwealth Games in Edmonton, Irish boxer Barry McGuigan, who won the bantamweight gold medal, was moved to tears when one of the officials, who happened to be Irish, sang 'Danny Boy' in lieu of the Irish national anthem, which they weren't able to play for technical reasons. This apparently endeared the song to both McGuigan and his fans, and for the rest of McGuigan's career, his father Pat would sing the song as a preamble to his matches. McGuigan went on to become the World Boxing Association Champion in 1985, the formalities concluded by his father once again singing 'Danny Boy'.
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