PGA Championship 2021: Phil Mickelson becomes oldest major winner | CNN
Phil Mickelson, at 50, Wins P.G.A. Championship - The New York Times
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PGA Championship - Wikipedia
PGA Championship 2021 live updates: Brooks Koepka starts strong, Dustin Johnson and Jordan Spieth struggle | Golf News and Tour Information | Golf Digest
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Tiger Woods withdraws from the PGA Championship : NPR
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