Peter William Thomson is an Australian professional golfer. He is best remembered for his five wins in The Open Championship.
Thomson was born in Brunswick, Australia. His 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 competed on the PGA Tour in 1953 and 1954 with relatively little success, and after that was an infrequent competitor. However in 1956, playing in just eight events, he won the rich Texas International, and achieved his best finish in one of the three majors staged in the United States, to finish ninth on the Money List.
In the era that Thomson won his first four Open Championships, it was true that very few of the leading professionals from the United States travelled to Britain to play in that event. At that time, the prize money in the Open was insufficient even for an American to cover expenses if he won. However, Thomson demonstrated with his win in 1965 that he could beat a field of the world's very best players, as that victory came against a field that included Arnold Palmer, Jack Nicklaus and Tony Lema, three of the top four American golfers from the 1964 Money List.