Sergio Garcia: The talented Spaniard has the game to compete with Tiger, but does he have the temperament? Fans here will be more tolerant of Garcia's club waggling routine, but he has to show a little more maturity when adversity strikes.
Ernie Els: It has been five years since Els won the second of his two U.S. Open titles, and he has come close in a handful of majors since. He hasn't played well recently, but Els is a streaky putter capable of going low at any time.
Phil Mickelson: He has to end his winless streak in the majors, now 0-for-40, at some point, given his stature as the world's No. 2 player. If the conditions stay soft, Mickelson has chance to become the first lefty since Bob Charles in 1963 to win a major.
Jose Maria Olazabal: He has the kind of game around the greens, as well as the ability to hit long iron shots, that should bode well this week, and his third-place finish in 1992 was his top appearance by far in the British Open by the two-time Masters champion.
John Cook: Though he hasn't won in four years, Cook, 44, has come close at Memorial and has been in the hunt a couple of other times. He was second to Nick Faldo at Muirfield in '92 and is one of Woods' close friends on tour.