COLUMBUS, Ohio — Stewart Cink got off to a great start in a bid to win his third straight senior major. Cink was the only player to make five birdies on the back nine at Scioto Country Club on Thursday, shooting a 3-under 67 for a share of the first-round lead in the U.S. Senior Open with Charlie Wi. Cink struggled on the front nine, shooting a 2-over 37, but found momentum once he made the turn. “I’ve been off for a little while, and I started like I’ve been off for a little while.