PEBBLE BEACH, Calif. - Teenager Jeffrey Aronson lucked into a thrilling opportunity at the U.S. Open: caddie for a practice round. Aronson, a 13-year-old junior golfer who just finished seventh grade back home in Los Angeles, was with his mother, Shelly, watching players on the putting green Sunday when amateur Russell Henley approached him to see if he would carry his bag for Monday's round at Pebble Beach. "It's a great way to kick off the summer," Aronson said. "I'll do whatever he needs, get range balls and carry his bags. It's perfect." That was a no-brainer for a kid...