NFL Week 8 is upon us, with things kicking off with Green Bay beating Carolina on Thursday Night Football. The Packers were the favorites in that matchup, but we've seen every week how underdogs are ready to compete with the idea of pulling off upsets. Sunday's schedule reveals more chances for bettors to win big by picking an underdog to come up with a big upset. Which NFL underdogs should bettors be considering for NFL Week 8? Claim the best Kalshi promo code CBSSPORTS55, trade $25+ on NFL games, and receive a $55 bonus here:

We've fired up the SportsLine Projection Model to break down Sunday's NFL games. The model, which simulates every NFL game 10,000 times, is up more than $5,000 for $100 players on betting sites on top-rated NFL picks since its inception. The model entered Week 8 of the 2026 NFL season on a 58-51 run on top-rated picks dating back to 2024. Anybody following its picks at NFL betting sites could have seen strong returns. Bet the NFL with the BetMGM bonus code CBSSPORTS and get up to $1,500 in bonus bets:

Best underdogs for NFL Week 8

 Claim the best Kalshi promo code CBSSPORTS55, trade $25, and receive a $55 bonus here:

Cardinals vs. Cowboys: Cardinals +250

The Cowboys remembered how to score points in Monday's 38-21 walloping of the Philadelphia Eagles, but that was a result over a thoroughly dispirited team. Dallas still has problems on defense that can rear their ugly heads at any moment, which could open the door for Arizona. The Cardinals win in just 31% of the SportsLine model's simulations, to be clear, but that's a rate that provides value at this price.

Ravens vs. Bills: Ravens +140

Lamar Jackson hasn't played since Oct. 4 but will be returning for a potential shootout against Josh Allen and the Bills. Buffalo is off to a 5-1 start, but the Bills' defense is a bit of a mess having allowed the second-most yards per game in the NFL this season. The Ravens win in 45% of the model's simulations, offering value at this price. Bet on the NFL with DraftKings and get $200 in bonus bets plus 3 free months of NBA League Pass when you spend $5+:

Broncos vs. Chiefs: Broncos +1.5

Has Bo Nix finally turned the page? After his play drew scathing reviews for weeks on end, the embattled Denver quarterback threw for 222 yards and a touchdown and added 77 yards and another score on the ground in Week 7's win over Arizona. It was a huge step in the right direction for the Broncos, who now host the Chiefs in Week 8. Kansas City's defense is notably better than Arizona's and the Chiefs can certainly put points on the board. But Denver has more than a fighting chance if Nix continues to play well. The Broncos cover in 53% of the model's simulations.