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The 2025-26 NFL regular season comes to an end with two Week 18 games on Saturday and 14 on Sunday, making it the perfect time to use the latest Underdog promo code CBSSPORTS2. The NFC South title is on the line on Saturday, when Bryce Young the Carolina Panthers battle Baker Mayfield and the Tampa Bay Buccaneers, which can be played on the best DFS apps. There are also nine NBA games and five bowl games on Wednesday, including the College Football Playoff quarterfinal at the Cotton Bowl between Miami and Ohio State. The Underdog promo code varies by location, but includes a potential Play $5, get $75 in bonus entries. Regardless of your location, using the Underdog bonus code CBSSPORTS2 will ensure you get the best Underdog promo code available in your state. Click here to get the latest Underdog promo code for new users:

How to claim the Underdog promo code on Wednesday, December 31

After downloading the Underdog Fantasy app, here's how to get started and use the Underdog promo code CBSSPORTS2. Follow these steps to claim your Underdog Fantasy deposit match bonus. 

  1. How to get started: click the CLAIM BONUS button below to access the latest offer and be redirected over to Underdog or click here.
  2. How to enter the Underdog bonus code: click "sign up" and enter your information to create an account. Then tap or click the 'Add Promo Code' button. Type in CBSSPORTS2.

  3. How to activate the Underdog bonus code for new users: If you have a Play & Get offer, enter any contest of $5+ to activate your welcome offer of $75 in bonus entries.

Get started here:

Best NFL Underdog Fantasy picks for Week 18

QB Baker Mayfield, Tampa Bay Buccaneers, 1.5 passing touchdowns - Higher (1.06x)

Mayfield has been productive of late. He has thrown for two or more touchdown passes in two of the past three games. He has surpassed the 1.5 mark in eight games in 2025-26. The SportsLine model projects 1.5 passing touchdowns, giving this a 4 out of 5 rating. Pick it at Underdog:

QB Bryce Young, Carolina Panthers, 1.5 passing touchdowns - Higher (1.12x)

Young plays well against the Buccaneers. He threw for two touchdowns in the Dec. 21 meeting against Tampa Bay, and in each of the last two games against the Buccaneers. He has also thrown for two or more touchdowns in three of the past six games. The model is projecting 2.0 touchdown passes, giving this a 4 out of 5 rating. Click here to sign up for Underdog Fantasy:

RB Christian McCaffrey, San Francisco 49ers, 5.5 receptions - Higher (1.08x)

McCaffrey is a beast. He caught nine passes against Seattle in the season opener and has caught six or more passes in 10 games this season. The model is projecting 7.7 receptions for a 4 out of 5 rating. Combine picks for a parlay on Underdog Fantasy for a potential payout of 7.1x.

The SportsLine Projection model also offers picks for every NFL picks for every game on the slate, which you can use to help guide you in making NFL picks on Underdog Fantasy. 

Must be 18+ (19+ in AL, NE; 19+ in CO for some games; 21+ in AZ, MA, and VA) and present in a state where Underdog Fantasy operates. Terms apply. See assets.underdogfantasy.com/web/PlayandGetTerms_DFS.html for details. Offer not valid in MD, MI, NJ, NY, OH, and PA. Concerned with your play? Call 1-800-GAMBLER or visit www.ncpgambling.org; NY: Call the 24/7 HOPEline at 1-877-8-HOPENY or Text HOPENY (467369).