Spieth selected the Longhorns, from the University of Texas which the three-time major champion attended, to beat the Horned Frogs of Texas Christian University on the College GameDay pre-game show. The Horned Frogs won 17-10.
The 29-year-old stoked up the crowd in Austin while in the studio and ahead of his appearance on air, Spieth admitted he's "as high on Texas football" as he's ever been.
"It's kind of like a bucket list experience for me. I think that's probably what's bringing a few of the nerves," Spieth said ahead of his big day.
"Luckily for this versus a golf tournament, I think I can have a couple of drinks before. Maybe that will calm me down.
Fit check pic.twitter.com/S5wSJDOd2I— PGA TOUR (@PGATOUR) November 12, 2022
"I'd say I'm a single-digit handicap (in college football knowledge). I feel like I'm not at a level where I could coach one drive, but I do follow and watch as much college football as I can.
"I would say they were a mixture of homer picks for some of my friends and, you know, a couple of toss-ups where I just had to find a way to lean somewhere."
In his freshman year at university, Spieth won three times and led the team in scoring average. He helped his side win the NCAA Championship and was named to the All-Big 12 Team.
Back in September, fellow Longhorn Scheffler was named PGA Tour Player of the Year and he received the Jack Nicklaus Award on College GameDay ahead of the Alabama at Texas football game in Austin.
Spieth was the first golfer to have the honour of being guest picker since Harris English went on after America's record-breaking win at the Ryder Cup at Whistling Straits in 2021.