KIAWAH ISLAND, US: Phil Mickelson became the oldest major winner in golf history on Sunday, the 50-year-old left-hander capturing the PGA Championship by two strokes for his sixth major title. The age-defying American took the $2.1 million (1.7 million euro) top prize with an epic victory for the ages, producing a dazzling shotmaking display at windy Kiawah Island’s while younger rivals faded. Mickelson erased the major age win mark set by American Julius Boros when he captured the 1968 PGA Championship at age 48. “This is just an incredible feeling,” Mickelson said. “I just believed it was possible but everything was saying it wasn’t.