(Stephen Munday/Getty Images)

Tom Lehman

1 week

Lehman spent an entire week in the No. 1 spot in the OWGR, doing so during the stretch from April 20-26, 1997. He is the only golfer to hold the top spot for just one week. Lehman also has one major to his credit, the 1996 Open Championship, which he claimed at Royal Lytham and St Annes Golf Club in the United Kingdom.