Dai Rees grew with golf on because his father was the golf pro at The Leys Golf Club. Later the family moved to Aberdare, where his father was the head pro at Aberdare Golf Club. At the age of 16, Dai was his father's Assistant. When Harry Vardon died in 1937, he took his position on the South Herts Golf Club about it. He stayed there, like Vardon, until the end of his years of life.
He is best remembered because he was the only captain in 1957 the British Ryder Cup team that defeated the Americans in the period between 1935 and 1985. The event took place on the Lindrick Golf Club inRotherham and the team consisted of Peter Alliss, Hugh Bradshaw, Eric Brown, Ken Bousfield, Norman Drew, Max Faulkner, Bernard Hunt, Christy O'Connor SR., Dave Thomas and Harry Weetman. After this victory, 1957, he was elected ' BBC Sports Personality of the Year '. A year later he became Commander of the order of the British Empire.
In total, he is 23 times the four rounds of The Open Championship played, seven times he finished in the top-10, but he never won.
At the age of 70, he was still second when Martini International. Shortly thereafter, he was injured in a car accident. He died several months later.
- 1935: PGA Assistants ' Championship
- 1936: News of the World Match Play on Oxhey Park Golf Club, PGA Assistants ' Championship
- 1938: News of the World Match Play
- 1947: Penfold Tournament (tie with Reg Whitcombe and Norman Von Nida) on Stoke Park
- 1948: Irish Open
- 1949: News of the World Match Play
- 1950: News of the World Match Play, British Masters, News Chronicle Tournament
- 1951: Yorkshire Evening News Tournament (tie with Norman Von Nida)
- 1953: Roof Tournament on Wentworth
- 1954: Belgian Open on the Royal Antwerp Golf Club
- 1956: Swiss Open
- 1958: South African PGA Championship
- 1959: British PGA Championship on the Ashburnham Golf Club, Swiss Open
- 1962: Ladies British Masters, Daks Tournament (tie with Bob Charles)
- 1963: Swiss Open
- 1966: PGA Seniors Championship
This list is not complete, it is generally assumed that he has won 39 tournaments, this there are 20;.
- Ryder Cup: 1937, 1947, 1949, 1951, 1953, and as captain in 1955, 1957, 1959, 1961 and 1967 (winners), 2010 (non-playing)
- Dai Rees was one of the organizers of the Nigerian Open.