Athletes Strip Down For the ESPN Body Issue, and We've Never Seen Such Toned Butts

He's the number one golf player in the world, but 29-year-old Brooks Koepka doesn't care about proving anything to anyone except himself. With two US Open wins and two PGA Championships under his belt, he's nowhere close to finished. "When somebody tells me I can't do something, I'm very eager to go out and go do it. Even if it's me telling myself, 'You can't win this golf tournament.' I want to prove to myself I can," he said in the interview.