Adam Scott
11 weeks
Scott was No. 1 during the summer of 2014 for 11 weeks. He has won his only major, the Masters, about 14 months before that. In March of 2014, he shot a 62 at the Arnold Palmer Invitational. A week after becoming the second Australian golfer to be ranked No. 1, Scott won at Colonial, confirming his newfound status, a spot he would hold just about three months.