He was born in Melbourne . Thomson's Open Championship wins came in 1954, 1955, 1956, 1958, and 1965. He was the only man to win the tournament for three consecutive years in the 20th century.
Thomson was a prolific tournament champion around the world, winning the national championships of ten countries, including the New Zealand Open nine times. He did not play in the United States very often, and he only won one event on the PGA Tour . His best finish in one of the three Majors staged in the United States was a fourth place at the 1956 U.S. Open .
Thomson enjoyed a successful senior career. In 1985 he won nine times on the Senior PGA Tour in the United States, and finished top of the money list. His last tournament victory came at the 1988 British PGA Senior Tournament. He was president of the Australian PGA from 1962 to 1994 and a victorious non-playing captain of the international team in the 1998 Presidents Cup .
- 1947 Australian Foursomes Shield (with H.R. Payne)
- 1948 Victoria Amateur Championship, leading amateur at the Australian Open
- 1950 New Zealand Open
- 1951 Australian Open , New Zealand Open
- 1953 New Zealand Open , New Zealand PGA Championship
- 1954 , British PGA Championship , Canada Cup (with Kel Nagle )
- 1955 , New Zealand Open
- 1956
- 1957 Yorkshire Evening News Tournament
- 1958 , Dunlop Tournament (United Kingdom), Daks Tournament (tied)
- 1959 Canada Cup (with Kel Nagle ), New Zealand Open , Italian Open , Spanish Open
- 1960 Yorkshire Evening News Tournament, New Zealand Open , Daks Tournament, Bowmaker Tournament, New Zealand Open , German Open, Hong Kong Open
- 1961 British PGA Match Play Championship, Yorkshire Evening News Dunlop Masters, Esso Golden (tied), New Zealand Open
- 1962 Piccadilly Tournament, Martini International
- 1963 Indian Open
- 1964 Philippines Open
- 1965 , Daks Tournament, Hong Kong Open , New Zealand Open
- 1966 British PGA Match Play Championship
- 1967 New Zealand Caltex Tournament, British PGA Match Play Championship, Alcan International, Australian PGA Championship, Australian Open
- 1968 Dunlop Masters (UK)
- 1972 Australian Open (golf) , Wills Tournament (United Kingdom)
- 1973 Victorian Open (Australia)
- 1976 Indian Open
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