Lee Westwood ended Tiger Woods’ 281-week-long run at No. 1. (Harry How/Getty Images)

13. Lee Westwood, 22 Weeks

An Englishman, Westwood has 42 pro wins, the bulk of which came on the European Tour. He was player of the year in 1998, 2000 and 2009. Westwood became No. 1 in 2009, ending the record 281-consecutive-week run of Tiger Woods.