Gay Robert Brewer, Jr. (March 19, 1932 – August 31, 2007) was an American professional golfer who played on the PGA Tour and won the 1967 Masters Tournament.
Brewer turned professional in 1956 and made his first cut, at the Agua Caliente Open, tying for 12th. His first top-10 as a pro came at the Philadelphia Daily News Open (tied for eighth), and his first top-five performance was at the Miller High Life Open in Milwaukee (tied for fifth). Playing on the PGA Tour in 1965, he won the Hawaiian Open. At the 1966 Masters Tournament, he bogeyed the final hole to finish in a three-way tie for the lead after regulation play but ended up finishing third to Jack Nicklaus following an 18-hole playoff. He came back to win the prestigious event the next year, scoring a one stroke victory over lifelong friend Bobby Nichols in the first live television broadcast of a golf tournament from the United States to Europe.