CNN  —  Professional golfer Wyndham Clark expressed regret Thursday for his behavior at last week’s US Open after reports on social media circulated that he had caused damage to Oakmont Country Club’s venerated locker room. The course at Oakmont frustrated many of the world’s best golfers last weekend and only one player, winner J.J. Spaun, finished under par. Clark did not make the cut to play over the weekend and finished at 8-over par. Following his missed cut, reports on social media