William Earl Casper Jr. (June 24, 1931 – February 7, 2015) was an American professional golfer. He was one of the most prolific tournament winners on the PGA Tour from the mid-1950s to the mid-1970s.
In his youth, Casper started as a caddie and emerged from the junior golf hotbed of San Diego, where golf could be played year-round, to rank seventh all-time in career Tour wins with 51, across a 20-year period between 1956 and 1975. Fellow San Diegan great Gene Littler was a friend and rival from teenager to senior. Casper won three major championships, represented the United States on a then-record eight Ryder Cup teams, and holds the U.S. record for career Ryder Cup points won. After reaching age 50, Casper regularly played the Senior PGA Tour and was a winner there until 1989. In his later years, Casper successfully developed businesses in golf course design and management of golf facilities.
Casper served as Ryder Cup captain in 1979, was twice PGA Player of the Year (1966 and 1970), was twice leading money winner, and won five Vardon Trophy awards for the lowest seasonal scoring average on the Tour.