ARLINGTON, Texas — Playoff-snubbed Ohio State got a bit defensive even without one of its best defenders in the Cotton Bowl.
Damon Webb returned an interception for a touchdown after recovering a fumble to set up an early score and the No. 5 Buckeyes beat No. 8 Southern California, 24-7, on Friday night in a matchup that traditionally has been in the Rose Bowl instead of deep in the heart of Texas.
The Big Ten and Pac-12 champions would usually play New Year’s Day in Pasadena, but the Rose Bowl is a College Football Playoff semifinal game this season.
Ohio State (12-2) instead quickly settled in at the NFL stadium where three years ago it won the first national championship in the four-team CFP format. The Buckeyes — with that bad loss at Iowa after an early setback to playoff team Oklahoma — were the first team left out this season.
‘‘The mind-set was obvious. We wanted to go down as one of the great teams at Ohio State, Big Ten champions, obviously a top-five finish,’’ Ohio State coach Urban Meyer said. ‘‘This will go down as one of the best teams I’ve ever coached and one of the best groups of young people I’ve ever been around.’’
USC (11-3), the Rose Bowl champion last season, lost for only the third time in 23 games. The Trojans had four turnovers that led to 21 Ohio State points in what could have been third-year sophomore quarterback Sam Darnold’s final game.
Buckeyes All-America junior cornerback Denzel Ward has already decided to go into the NFL Draft and didn’t play after practicing with the team this week.
With Ward on the sideline in his No. 12 jersey over street clothes, fellow defensive back Webb had a fumble recovery on the third play of the game. That led to J.T. Barrett’s 1-yard keeper for a score that put the Buckeyes ahead to stay.
‘‘We kind of shot ourselves in the football in this game,’’ USC coach Clay Helton said. ‘‘You’re putting a hurt on your defense, and it led to points early in the game, and separation early in the game.’’
Webb’s 23-yard interception return for a TD put Ohio State up 17-0 less than a minute into the second quarter. It was the first pick-six this season for the Buckeyes, and the team-leading fifth interception for Webb.
Ohio State was up, 24-0, when Barrett ran 28 yards for another touchdown after the first of Darnold’s two fumbles when stripped while being sacked. Darnold was sacked eight times overall.
‘‘That defensive line took a quarterback that we have a tremendous amount of respect for and he didn’t set his feet all night,’’ Meyer said. ‘‘That’s the way we won that game.’’
Barrett, playing his final college game only about a two-hour drive from his hometown of Wichita Falls, Texas, broke Drew Brees’s Big Ten career record for total offense with 12,697 yards. Barrett played 50 games and was 38-6 as a starter. His 147 touchdowns (104 passing, 43 rushing) are also a Big Ten record, 41 more than Brees at Purdue.
‘‘I love him. He’s a member of the Meyer family as I’ve said many, many times,’’ Meyer said. ‘‘More importantly, he’s a legend at Ohio State. He’s always going to have a home at Ohio State.’’
Meanwhile, Darnold, who became the first Trojans quarterback ever with more than 4,000 yards passing in a season, has until Jan. 15 to decide if he will head to the NFL or return to USC for another season. He didn’t indicate afterward what his decision will be.