Michael Greller never imagined that a simple act of kindness eight years ago could lead to a moment like this at the U.S. Open. Greller, the caddie for Jordan Spieth, stood on the 18th tee at Pinehurst No. 2 on Tuesday and conferred with his 20-year-old boss on an important tee shot in a match they didn't want to lose against Phil Mickelson and Rickie Fowler. Moments later, Greller was sharing a laugh with Spieth's partner, 21-year-old Justin Thomas, who is playing in his first U.S. Open. Thomas and Spieth have known each other since 2007, when they battled all summer on the junior circuit and were selected to represent the United States in the Evian Junior Masters in France. More...