Wyndham Clark's Ex Allegedly Cheated with Baker Mayfield

U.S. Open Champ Wyndham Clark Says Ex Cheated on Him With Baker Mayfield

Wyndham Clark just won the U.S. Open ... but instead of talking birdies and bogeys, he's airing out a relationship saga involving Baker Mayfield ... and it sounds like his chick picked the football over golf. Wyndham stopped by Barstool Sports'…

By TMZ Staff