William Leslie was a Scottish-Argentine footballer who played as a defender for Lomas Athletic Club.

[2] Leslie began his career in Lomas Athletic Club, team where he had won the first division championship 1893,[3] and it had been the top scorer with 7 goals.

[4] Between 1900 and 1904 Leslie played in Quilmes Atlético Club.

[6] The match was played on 20 July 1902 in Montevideo, with a score 6–0 in favor of Argentina.

[7] Some of the Argentine goals were scored by Charles Dickinson and Juan Brown.