AP Photo Erik Compton reacts to missing an eagle putt on the 17th hole during the first round of the Greenbrier Classic. Compton birdied the hole and finished at 7-under-par.

WHITE SULPHUR SPRINGS, W.Va. (AP) — Erik Compton is a walking billboard for organ donation and sheer determination. He’s also at the top of the Greenbrier Classic leaderboard. Playing on a late sponsor exemption, the 30-year-old double heart transplant recipient shot a 7-under 63 on Thursday to share the first-round lead with rookie Matt Every in the inaugural tournament. Compton spent eight straight days doing yard work at home in Miami before he got the call Saturday to play in the tournament. He’s making the most of his late invite, overcoming a slow start with nine birdies on the Old White course. “You know, some guys miss six, seven cuts in a row and then win,” Compton said. “I know I’m a good player, and I have a lot of the adversity in front of me with the game and health. But I always feel like if I stick in there and keep trying, something eventually good is going to happen.” George McNeill, Pat Perez and Jeff Overton opened with 64s.