The Underdog promo code TOPACTION from Action Network gives new users a $100 bonus once they play $5 on the platform. That $5 entry must settle (win or loss) before the Underdog bonus funds become available for you to use. I recommend this NFL promo since the structure pays out the bonus all at once, streamlining how quickly you get extra ammunition to fire on one of the top DFS sites in North America.
I break down exactly how the Underdog promo code TOPACTION works, and I’m tying the offer to Thursday Night Football (8:15 p.m. ET on Prime Video). Read on to learn more about Seahawks vs. Broncos and how to unlock the $100 Underdog sign-up bonus.
How Underdog Promo Code TOPACTION Works
New users who enter the Underdog promo code TOPACTION during sign-up unlock a straightforward path to bonus cash. The process takes just a few minutes on mobile:
- Download the Underdog app to begin registration.
- Create an account by entering your personal identifying information.
- Insert Underdog promo code TOPACTION in the proper field.
- Make a first deposit and enter a real money Pick’em or Draft entry of at least $5.
- Receive a $100 bonus credited to the account after the entry settles.
This offer applies to first time users only, and is only redeemable once per new account. Underdog is available in the following states: AL, AK, AZ, AR, CA, CO, DE, DC, FL, GA, IL, IN, KS, KY, MA, MD, MI, MN, MS, MO, NE, NH, NJ, NM, NC, ND, OH, OK, OR, PA, RI, SC, SD, TN, TX, UT, VT, VA, WV, WI, and WY.
Underdog Bonus Structure Explained
Here is a quick breakdown of how the Underdog sign-up bonus from Action Network compares to competing DFS promos and how their offers are traditionally structured:
| Requirement | Underdog Promo Code TOPACTION | Typical Industry Offer |
|---|---|---|
| Minimum play | $5 | $20 or more |
| Bonus amount | $100 | $50 to $100 |
| Payout format | Bonus cash | Bonus cash |
| Redemption | One time | One time |
The lower entry requirement matters because it lowers the barrier for first time users. A $5 play stands as one of the smallest qualifying amounts I see available across the fantasy sports space ahead of Thursday Night Football today, Thursday, Oct. 15, 2026.
Three Seahawks vs. Broncos DFS Picks on Underdog
I built an Underdog pick 'em entry of my own using the higher or lower format on the platform. Here are the three Seahawks vs. broncos predictions I'm backing on Underdog:
- Jaxon Smith-Njigba, Higher receiving yards. Smith-Njigba enters the week as the engine of Seattle’s passing game. Injuries to the Seahawks' running backs pushes more volume his way against a Denver secondary battling injuries at cornerback.
- Bo Nix, Lower passing yards. Denver’s offense leans on short, controlled throws rather than deep shots. That style keeps Nix’s passing total under typical starter numbers, even in a full workload.
- Emanuel Wilson, Higher rushing yards. Wilson leads Seattle’s backfield with JaDarian Price on IR and Zach Charbonnet working his way back. A a short week favors a straightforward ground plan that keeps his carries high and the offense on schedule.
If you like my analysis and breakdown of Underdog promo code TOPACTION, sign up now to make Seahawks vs. Broncos DFS picks before tonight's 8:15 p.m. ET kickoff.
Underdog T&Cs
Must be 18+ (19+ in AL, NE; 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).
