The opening round of matches continued to evolve Monday when the world ranking listed Perez at No. 64, up one spot from where he was Sunday night.
Then, the PGA TOUR disclosed that Brett Wetterich withdrew last week because of a shoulder injury. Ernie Els, at No. 4 in the world, already said he is not playing.
That means Anthony Kim would face Woods in the first round. J.B. Holmes would play Phil Mickelson and Perez would play Steve Stricker.
The 64-man field for the Match Play, to be played Feb. 20-24 in Tucson, Ariz., will not be final until next Monday.