Donald Lawlor was the goalkeeper for the Irish football team at the 1948 London Olympic Games. He kept goal in Ireland's 3-1 defeat to the Netherlands at Fratton Park, Portsmouth on 26 July 1948, earning particular praise from the OCI's Official Report for making 'several quality saves, going down in front of a forward's feet when the occasion demanded courage.' The match eliminated Ireland before the Opening Ceremony.
Goalkeeper Donald Lawler first played for Bohemians FC in the League of Ireland in the 1947-48 season, making 16 appearances with the team that season, and 20 in 1948-49 season.
Lawler immigrated to Canada the early 1950s along with his wife and 4 children, and later had one more daughter in Canada. By the early 1960s the family settled in Edmonton, Alberta and he found work as a butcher and later as a salesman.