All of the USC fans waiting to find out whether Heisman Trophy winner Matt Leinart will stay on and try to win another national championship his senior year or jump to the NFL will have to wait one more day.

Leinart will announce his decision at a press conference on Friday at 2:30 p.m., at USC’s Heritage Hall.

Leinart, the University of Southern California’s junior quarterback who led the team to a 55-19 win in the Orange Bowl against Oklahoma, said he is uncertain which way he’ll go.

If he departs, he could receive a guaranteed eight-figure signing bonus, part of a contract that could top $40 million over five years if he is among the first players selected by NFL teams in April, said news reports today.

Leinart is one of three USC players facing the same decision. Linebacker Lofa Tatupu and punter Tom Malone, both juniors, also plan to announce whether they’ll leave school. The NFL’s deadline to declare for the draft is Saturday.