Jordan Spieth won the first two major golf championships of 2015, the Masters and the U.S. Open, yet came one shot short of a playoff bid at the British Open – a “failure” that he says is fueling him as he takes to the course today at the PGA Championship, played this year at Sheboygan, Wisconsin. Spieth is ranked No. 2 in the world, but another young golfer, Rory McIlroy, remains ranked No. 1. And Tiger Woods? At this point in his career, the question is whether he can put tog