Fred Couples does not look like he belongs atop the leaderboard on the PGA Tour. Except that he's at Riviera. Despite a bad back that hurts when he stoops over a short iron, Couples navigated around his favorite tour course without a bogey Friday for a 5-under 66 that gave him a two-shot lead in the Northern Trust Open. It helped that he knocked in an eagle putt of nearly 100 feet on his opening hole, along with a pair of 30-foot birdie putts. But even for a 51-year-old well past his prime, he was carried along by a languid swing and his love for Riviera. "I feel like I can play this course blindfolded," Couples said. Some of his peers couldn't believe what they saw. Read more: http://sports.espn.go.com/golf/news/story?id=6136681