His senior season in 1996 was arguably the best in school history. Arizona State attracted national attention on September 21 when they shut out top-ranked Nebraska to snap the Huskers' 26-game winning streak. Plummer evaded a sack to toss a 25-yard touchdown on the game's opening drive, and finished 20 of 36 for 292 yards, setting a new school record for career passing yards in the process. He led ASU to an undefeated regular season and a Pac-10 championship, aided in no small part by fellow all-conference linebacker and close personal friend Pat Tillman. In the Rose Bowl, he scored a sensational 11-yard go-ahead touchdown run late in the fourth quarter, but Ohio State responded and won A victory likely would have meant a national championship as the only undefeated team in the nation, but their final ranking was fourth. Plummer was third in the Heisman Trophy voting behind Florida's Danny Wuerffel and Iowa State's Troy Davis, was a second team All-American, and the Pac-10's Offensive Player of the Year.