Phil Mickelson cemented his place in golf history on Sunday, becoming the oldest winner of a major tournament with his victory at the 2021 PGA Championship. In winning at age 50, Mickelson surpassed the record previously held by Julius Boros, who won the PGA Championship in 1968 at age 48. Mickelson's previous PGA Championship came 16 years ago in 2005. Mickelson said after the big win: "One of the moments I'll cherish my entire life."