Golfer Rory wins his fourth major championship

LOUISVILLE, Ky. --- Golf's number one ranked player, Rory Mcilroy, came into Sunday's final round of the PGA Championship with a one stroke lead.

Throughout the day at Valhalla, the lead changed multiple times as other golfers stepped up their game.

At the end of the day, under a dark and cloudy sky, Rory beat out Phil Mickelson by just one stroke.

This is Rory's fourth major championship.