The Redbirds (8-2, 5-2 Missouri Valley) won their seventh straight road game.
The game was scoreless until Nick Aussieker's 36-yard field goal for Illinois State with 6:52 remaining in the third quarter. Walker had his touchdown catch, a 4-yarder, later in the quarter, and Dunn made it 17-0 on a 3-yard run with 2:52 left in the game.
Indiana State scored all of its points in the final 31 seconds. Perish hit Michael Mardis with a 6-yard TD, and after an onside kick recovery, Tann Fritschle made it a one-score game with a 33-yard field goal with six seconds remaining. The Sycamores recovered another onside kick, but it was negated by an offside penalty.
The Florida Gators will start Treon Harris at quarterback in Saturday's opener vs. New Mexico State over redshirt freshman Will Grier, coach Jim McElwain said Tuesday.
Baylor University has hired a Philadelphia law firm to independently investigate the university's handling of sexual assault complaints, including one against defensive end Sam Ukwuachu.
Oregon State and former coach Mike Riley face a federal Title IX lawsuit filed by a woman who said she was raped as a result of the coach's failure to correct a sexually violent culture.
James Madison players will wear decals on their helmets during Saturday's season-opening game in memory of the two journalists who were killed during a live television broadcast.
Los Angeles prosecutors have charged a man in connection with the theft of the University of Southern California's copy of O.J. Simpson's Heisman Trophy more than 20 years ago.
Former running back Lawrence Phillips has been charged with first-degree murder in the April death of his cellmate at Kern Valley State Prison.