(1902-71) a US golf player. He was the most successful amateur player (= one who does not accept money for playing) ever, and never became professional. He won the US Open four times (1923, 1926 and 1929-30). In 1930 he became the only person ever to win the four major competitions, the Amateur and Open contests in both the US and Britain. Jones also helped to establish the US Masters Tournament at Augusta, Georgia.