He called the rumors "absurd" after practice Wednesday.
Fisher has been a popular suggestion on USC message boards in the wake of a disastrous 10-7 loss to Washington State, Kiffin's sixth defeat in his last eight games dating back to last season.
Fisher played linebacker at USC from 1977-80, but has never coached in the college ranks. Now in his 18th full season as an NFL head coach, Fisher has a record of 150-128-1 with three division titles and one Super Bowl appearance.
Denver Broncos defensive coordinator Jack Del Rio, who played linebacker at USC from 1981-84, is also likely to be discussed. Del Rio also has no experience as a college coach, but has some familiarity with the recruiting process. Del Rio's son Luke accepted a scholarship offer from Oklahoma State before deciding to walk-on at Alabama.
A true freshman for the Crimson Tide, Luke is one of two players simulating Texas A&M quarterback Johnny Manziel on the scout team offense ahead of Saturday's titanic SEC opener between top-ranked Alabama and the No. 6 Aggies.