Phil Mickelson isn't the only player capable of replacing Tiger Woods at No. 1.
For the second straight week, Woods is looking over his shoulder at two players who can end his record 270-week reign atop the world ranking -- Mickelson and Steve Stricker.
Mickelson would reach No. 1 for the first time with five scenarios: a victory in the PGA Championship; runner-up finish with Woods out of the top three; third-place finish with Woods out of the top 11; fourth-place finish with Woods outside the top 46; a two-way tie for fourth with Woods missing the cut.
Stricker has a tougher time. He could go to No. 1 only by winning the PGA Championship, provided Woods finishes out of the top 24 and Mickelson is out of the top three.