Xander Schauffele is one of the best golfers in the world, but had one thing missing in his resume. The No. 3 player in the world was without a major championship title at age 30. In his 28th career major championship start, Schauffele finally secured a green box on his Wikipedia page. The Wanamaker Trophy belongs to the Southern California native. Xander Schauffele went wire to wire shooting 62-68-68-65 to record a major championship record 21-under par at Valhalla Golf Club in Louisville, Kentucky. However, a birdie putt was needed at 18 on Sunday evening to give Schauffele a one-shot victor…