ST. LOUIS -- Golf isn't a game of running, but Jordan Spieth had to trot to catch up with his playing group after stopping by a restroom on the 10th hole. As the eighth-ranked player in the world jogged, a dart of lime green met him with an outstretched hand."I just ran up, and I stuck my hand out," said Jackson Baker, a 9-year-old from Poplarville, Miss.Spieth high-fived Baker, and nearby fans erupted with cheers.