Jason Day
51 weeks
Day became the No. 1 golfer in the world for the first time in September 2015. He has 12 PGA Tour victories and has finished second 10 times. His lone major title came in the 2015 PGA Championship.
Sports blog information from USA TODAY.
The Official World Golf Ranking was introduced in 1986. Since its introduction, 21 different players have been ranked No. 1 in the world.
Day became the No. 1 golfer in the world for the first time in September 2015. He has 12 PGA Tour victories and has finished second 10 times. His lone major title came in the 2015 PGA Championship.