Oakmont, Pennsylvania CNN  —  Sam Burns came into Friday knowing that he could play at Oakmont. He also knew what the course could do to him, having finished with three bogeys and one double bogey during Thursday’s opening round. Burns chose not to dwell on how his round ended and instead focused on the five birdies that came earlier. “I played really well yesterday other than the finishing holes,” he said to reporters after his round Friday. “So, I think today was just kind of getting mentally