Kelvin David George Nagle AM (21 December 1920 – 29 January 2015) was an Australian professional golfer best known for winning The Open Championship in 1960.

During his early career, he had a long swing and was regarded as the longest hitter on the Australasia tour, as evidenced by the Australian press dubbing him as "the Pymble Crusher".

[2] By age 39 (in 1960, when he won The Open Championship), Nagle had shortened his swing and become a straight hitter with what Gary Player described as "the best short game out here".

Thomson told Nagle a few weeks prior to the 1960 Open championship that he "had the game" to win and that "you can beat me".

His best result in a United States major was second in the 1965 U.S. Open—the year after he won the Canadian Open—when he and Gary Player finished the 72-hole tournament in a tie.