Clay Walker will play golf on three of the world's most famous courses on Oct. 7-10 at the Dunhill Links Championship in Scotland. This is Walker's third time to play in the $5 million pro-am tournament. His foursome includes Kevin Costner, golf pro Steve Elkington and another as-yet-unspecified pro. Walker and Costner are longtime friends. Walker sang at Costner's wedding on Sept. 25.