In September, Tiger Woods battled Vijay Singh in a Labor Day final pairing at the Deutsche Bank Championship. That round became a passing of the torch, as Singh won the event and stole the title of No. 1-ranked golfer from Woods, who had owned it for 264 consecutive weeks.
Two weeks ago, Tiger reclaimed the throne in another memorable final-round pairing. Woods bested Phil Mickelson at Doral in historic fashion.
And yet, despite the competition Woods has received from Singh and Mickelson, perhaps neither one is his main competition. ESPN.com's Bob Harig and Golf World's Ron Sirak have different takes on just who is Tiger's biggest rival.