The Ducks (11-2) dominated throughout even though their famously high-powered offense scored just one touchdown, when Josh Huff turned a short pass from Mariota into a spectacular 16-yard sprint to the end zone.
Brown received warm goodbyes from a sellout crowd in what was practically a home game for Texas (8-5). Even the school marching band spelled his name at halftime.
But the blowout was a final reminder of why Brown is resigning after 16 seasons at Texas, which he led to a national championship in 2005 but couldn’t reverse a sharp decline in recent years.
Mariota led all rushers with 133 yards on 15 carries, making sure Oregon eased the sting of not playing in a BCS bowl for the first time in five years. He was 18 of 26 for 253 yards passing in his Heisman Trophy campaign tuneup for 2014, having announced earlier this month that he was coming back for his junior season.
Running back Malcolm Brown was the lone offensive constant for Texas, finishing with 130 yards on 26 carries.
Texas now shifts its focus to finding a replacement. New Texas athletic director Steve Patterson said before kickoff that he wants a successor by Jan. 15.
ARMED FORCES BOWL
NAVY 24, MIDDLE TENNESSEE STATE 6
In Fort Worth, Texas, Keenan Reynolds ran for 86 yards with two more touchdowns and Navy won for only the second time its past seven bowl games, beating Middle Tennessee State.
Reynolds had a 3-yard score to cap the opening drive for Navy (9-4) and added a 1-yarder in the fourth quarter. Already with the NCAA record for touchdowns rushing by a quarterback, Reynolds upped his total to 31 to match Colorado State running back Kapri Bibbs, also a sophomore, for the national lead this season.
Middle Tennessee (8-5) was held to a season low in points. The Blue Raiders finished the regular season with a five-game winning streak, averaging nearly 43 points a game in that stretch – since a 34-7 loss Oct. 12 at North Texas, about 40 miles away from the TCU campus where the bowl was played.