This Day in Golf History: May 18
On this date in 1964, Arnold Palmer won the Oklahoma City Open after shooting a fourth-round 67. His 277 score for the week earned him $5,800. The victory came five weeks after he won the final major of his career, the Masters Tournament, April 9-12, with a four-round line of 69-68-69-70—276, worth a top prize of $20,000.