Davis picked off Chris Mills and returned the ball 49 yards for a touchdown to give the Leathernecks (2-0) a 24-14 lead in the third quarter. Western Illinois intercepted Mills four times, including twice in the fourth quarter.
Hudson was 14 of 20 passing for 140 yards with an interception. Caulton Ray ran for 99 yards on 19 attempts.
Klay Fiechter rushed for 122 yards and a touchdown on 27 carries for the Greyhounds (0-2), and Mills threw a 52-yard touchdown pass to Mar'quone Edmonds in the third quarter to make the score 24-17. But Indianapolis, a Division II school, got no closer.
Transfer Vernon Adams will be the starting quarterback when Oregon begins its season against Eastern Washington on Sept. 5.
Tim Beckman is threatening legal action after Illinois fired him as football coach Friday amid allegations of influencing medical decisions and pressuring players to play hurt.
LSU offensive coordinator Cam Cameron revealed in a post-practice news conference that he has been treated for prostate cancer but plans to coach this season.
The woman who accused former Baylor defensive end Sam Ukwuachu of raping her in 2013 has hired a Title IX law firm to represent her in potential civil litigation.
Arkansas tight end C.J. O'Grady has been arrested by Fayetteville police and charged with driving while intoxicated and being a minor in possession of alcohol.
Cincinnati coach Tommy Tuberville said he will consider withholding some cost of attendance money from players who fail to meet academic requirements or violate team rules.