Tiger Woods poured in one birdie after another, more than he had ever made in one round of the U.S. Open, each of them followed by cheers that could be heard down the Pacific coastline at Pebble Beach. Dustin Johnson didn't realize they were for Woods. He played like he didn't care. Johnson turned in a prime-time performance of his own Saturday in the U.S. Open, overpowering Pebble Beach and closing with two birdies for a 5-under 66 to build a three-shot lead over Graeme McDowell of Northern Ireland. http://sports.espn.go.com/golf/usopen10/news/story?id=5306217