Professional golf has a long history and a long memory. Today marks the start of the 99th PGA Championship, held this year at the Quail Hollow Club in Charlotte, NC. It’s one of the four major championship events in pro golf – and over the many decades, only five players have managed to complete a grand slam by winning all four events. That fabled quintet is Gene Sarazen, Ben Hogan, Gary Player, Jack Nicklaus, and Tiger Woods. And over the next four days, Jordan Spieth, at age 24, has his first chance to wield his clubs to join that august club – and be the youngest player to achieve that very elusive and impressive feat.