The Official World Golf Ranking was introduced in 1986. Since its introduction, 21 different players have been ranked No. 1 in the world.
Justin Rose
13 weeks
Rose posted the best cumulative score at all of the four majors in 2018, including a second place finish at the Open Championship. Those performances vaulted him to No. 1 in the OWGR. Rose would also win the FedEx Cup championship that year.