Play $5 to get $100 in bonus funds for NFL Sunday with the Underdog promo codeYAHOOBONUS.

Turn your first entry into $100 in bonus funds with promo code YAHOOBONUS

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. Concerned with your play? Call 1-800-MY-RESET or 1-800-GAMBLER or visit www.ncpgambling.org; AZ: 1-800-NEXT-STEP (1-800-639-8783) or text NEXT-STEP to 53342; NY: Call the 24/7 HOPEline at 1-877-8-HOPENY or Text HOPENY (467369).

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Underdog promo code

YAHOOBONUS

New user offer

Place a $5 entry and receive $100 in bonus funds 

Bonus type

Receive $100 after an eligible first entry of at least $5

Minimum deposit

$10 (all Underdog deposit methods have a $10 minimum)

Age

18+, rising to 19+ or 21+ in some states

Eligible states

40 states plus DC; check the in-app list

Information verified on

October 2, 2026

Underdog promo code terms

  • New customers only: 18+ in most states, 19+ or 21+ in others. Check your state.

  • Minimum deposit: $10 is the minimum deposit for all Underdog deposit methods.

  • Match rate: an initial play of $5 returns $100 in bonus funds.

  • Bonus funds: not withdrawable, and subject to a playthrough requirement.

  • Underdog Predict: a separate prediction market with its own state list.

How to claim Underdog promo code YAHOOBONUS

  1. Click through from this page to Underdog.

  2. Register an account and enter Underdog promo code YAHOOBONUS.

  3. Complete verification prior to your first entry.

  4. Deposit at least $10.

  5. Build your first pick'em entry for the Big Ten showdown Friday night.

Enter code YAHOOBONUS on your first $5 bet to receive $100 in bonus funds

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. Concerned with your play? Call 1-800-MY-RESET or 1-800-GAMBLER or visit www.ncpgambling.org; AZ: 1-800-NEXT-STEP (1-800-639-8783) or text NEXT-STEP to 53342; NY: Call the 24/7 HOPEline at 1-877-8-HOPENY or Text HOPENY (467369).

Three Underdog picks for Sunday

Player

Projection

Our pick

Josh Allen, BUF

0.5 Rush and Receiving TDs

Higher

Saquon Barkley, PHI

0.5 Rush and Receiving TDs

Higher

Malik Willis, MIA

169.5 Pass Yards

Lower

Josh Allen rushing for at least one touchdown is a pretty safe place to start your picks these days, and Saquon Barkley probably isn't going two weeks in a row without punching one in. That brings us to our third pick: Malik Willis on the road against a stingy Vikings defense. Willis has easily cleared 169.5 yards in his first three starts, but the Vikings are a different degree of challenge.

Build these picks with Underdog promo code YAHOOBONUS

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. Concerned with your play? Call 1-800-MY-RESET or 1-800-GAMBLER or visit www.ncpgambling.org; AZ: 1-800-NEXT-STEP (1-800-639-8783) or text NEXT-STEP to 53342; NY: Call the 24/7 HOPEline at 1-877-8-HOPENY or Text HOPENY (467369).

Underdog promo code FAQ

Can I withdraw the $100 in bonus funds?

No. The bonus funds are issued regardless of whether the first play wins or loses, but the bonus funds must meet a playthrough requirement to be withdrawn.

How big a deposit do I need?

$10 is the minimum deposit that can be placed with Underdog, including for first deposits.

This page contains affiliate links. A commission or other compensation may be earned when you click through.