College Football Underdog Picks & Upset Predictions for Week 1

Colby Marchio - Contributor at Covers.com
Colby Marchio • Betting Analyst 7+ years betting experience
Updated: Sep 3, 2026 , 12:33 PM ET • 4 min read

One thing you can almost always count on is Jeff Brohm teams keeping games close. I'm taking that a step further and backing Louisville to get an underdog win in Week 1.

Jeff Brohm Louisville Cardinals NCAA College Football
Photo By - Reuters Connect. Louisville Cardinals head coach Jeff Brohm leads his team on the field before the Boca Raton Bowl

Hot. Corn. Bull. I love all the dogs.

Week 1 is here, and so are this week’s college football underdog picks! I found three underdogs with some bite, sprinkled across the next four days for us to sweat out together.

Before you dive in, check out all of our college football picks.

CFB Week 1 underdog picks

Pick Kalshi
Probability
 San Jose State San Jose State 44.64%
 Colorado Colorado 33.56%
 Louisvilla Louisville 31.45%

Percentages courtesy of Kalshi, one of the best prediction market apps.

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San Jose State San Jose State (vs. Eastern Michigan)

Kalshi probability: 44.64%

It's simply too hard to overlook how good San Jose State quarterback Luke Weaver looked against a USC defense we were told would be polished and improved. The senior quarterback completed 65.5% of his passes for 234 yards and two touchdowns. For those thinking 234 yards is nothing, his passing yards prop last week was 152.5 yards.

Last week, Eastern Michigan allowed Sacramento State's quarterback to throw for more than 220 yards while completing 54.3% of his passes. If Weaver can replicate that success — which came against a Power Four defense — he should be just fine against an Eastern Michigan defense that allowed 30 points and more than 410 yards per game a year ago.

In Weaver we trust.

Colorado Colorado (vs. Georgia Tech)

Kalshi probability: 33.56%

Full transparency, I am holding a Colorado +7 in my back pocket, and I know a lot of people will be pouncing on the -6.5 in favor of Georgia Tech.

Rightfully so. That is the number to get if you like a team that lost a superstar quarterback and both coordinators, while bringing in the brother of a former Heisman Trophy winner and first-overall draft pick to start a new era for the Yellow Jackets.

On the other end, Colorado brings in a new coordinator who should bring some life to this offense. The unit will be led by redshirt freshman Julian Lewis, who gets a bunch of toys to play with in Danny Scudero, Kam Perry, DeAndre Moore Jr., and Ernest Campbell. The group combined for 3,560 receiving yards and 28 touchdowns in 2025.

With how many significant holes the Yellow Jackets had to fill after last season, those losses are too significant to overlook.

Give me the Buffs!

For more, dig into Rob Paul's complete Colorado vs. Georgia Tech predictions.

Louisville Louisville (vs. Mississippi)

Kalshi probability: 31.45%

Death. Taxes. Trusting Jeff Brohm to keep a big game close. 

Brohm is notorious for getting the most out of his players in big games, especially against ranked opponents. The Louisville head coach is 27-15 against the spread (5-2 at Louisville) with 20 outright wins as an underdog dating back to his time at Purdue. He is also 4-0 against AP Top 5 teams in the regular season. 

This No. 9 Mississippi team should be just as good as last season, maybe better. Led by one of the most dynamic football players in the country, Trinidad Chambliss. However, Mississippi is under far more pressure than Louisville. Also, was last year's success all coming together in spite of Lane Kiffin's departure? The power of friendship is real. 

Former Ohio State quarterback — and now Louisville starter — Lincoln Kienholz has received high praise for being very smart, tough, and athletic. Expectations are high that Brohm will get a lot out of him. 

Week 1 underdog combo

San Jose State

Colorado

Louisville

Odds are correct at the time of publishing and are subject to change.
Not intended for use in MA.
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Colby Marchio
Betting Analyst

Colby Marchio is a two-time DePaul alum and former Division 1 (club) baseball player who has been sports betting since 2019. Since graduating in 2021, he has worked throughout the media circuit, hosting and appearing on various television and radio shows while making countless guest appearances discussing Major League Baseball, college basketball, college football, and the National Football League.

A self-proclaimed numbers nerd, Colby may enjoy digging through the data even more than winning itself. That passion is why his two favorite sports to cover are college basketball and Major League Baseball. 

As for his favorite sportsbook, it is whichever one has the best price, or whichever one is not taxing him as an Illinois resident. 

You can find all of his plays and more @ColbyMBets on Twitter/X.

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