Register for a new DFS account now with Action Network's exclusive Underdog Fantasy promo code TOPACTION today to claim a $50 bonus. Create a $5+ first entry with players from Seahawks vs. Cardinals on Thursday Night Football at 8:15 p.m. ET or any other sports today to secure $50 in bonus cash.
Underdog Fantasy is one of the premier destinations for daily fantasy sports right now and represents an excellent alternative to online sports betting, especially in states where online sportsbooks are not legal yet.
If you are in one of the states listed in the chart below, then sign up now with the Underdog Fantasy promo code TOPACTION to claim one of the best options outside of the top NFL betting promos.
| Underdog Fantasy Promo Offer | DFS States Available | Underdog Promo Code Sign-Up Link |
|---|---|---|
| Play $5, Get $50 | AL, AK, AR, DC, FL, GA, IL, IN, KS, ME, MS, MN, NE, NM, NC, ND, OK, OR, RI, SC, SD, TX, VT, VA, UT, WI, WY | TOPACTION |
Underdog Fantasy Promo Code TOPACTION: Play $5+ Entry on Seahawks vs. Cardinals TNF, Get $50 Bonus
Sign up with the Underdog promo code TOPACTION and place a $5+ first entry to claim $50 in bonus cash. This bonus gives you bonus cash to play in draft contests and create entries for any sport, including Week 4 NFL matchups. Use the module below to create your account and activate the offer today.
Underdog Fantasy offers two entry types. A Standard entry requires all of your selections to hit for a payout, but it delivers the largest multiplier. A Flex entry pays less for perfection but allows you to miss one pick and still receive a smaller return. This setup lets you choose between higher upside or extra security depending on your strategy.
Here is an example of an entry I created for tonight's Thursday Night Football matchup between the Seattle Seahawks and the Arizona Cardinals:
- Jaxon Smith-Njigba LOWER than 84.5 Receiving Yards
- Kyler Murray HIGHER than 29.5 Rushing Yards
- Tory Horton HIGHER than 14.5 Longest Reception
Suppose I place this entry as a $5 Standard, which has a 6x payout multiplier, with the Underdog Fantasy promo code TOPACTION.
- If all of my picks win, I receive a $30 total payout ($25 profit + $5 entry back) and $50 in bonus cash.
- If one or more of my picks lose, I receive the $50 in bonus cash only.
Steps to Claim Your Underdog Fantasy Promo: Thursday, September 25, 2025
Follow the steps outlined below to claim your $50 bonus with the Underdog Fantasy promo code TOPACTION today:
- Step 1: Click this link or any sign-up module on this page to download the Underdog app.
- Step 2: Create a username and password.
- Step 3: Fill in your email, date of birth, and all other required personal information to create a new Underdog account.
- Step 4: Enter the Underdog promo code TOPACTION and play a $5+ entry to get $50 in bonus cash.
- Step 5: Agree to the Underdog Terms of Use and Privacy Policy.
- Step 6: Click "Sign Up."
- Step 7: Make your first deposit of $10+.
- Step 8: Create your first entry at Underdog with picks from Seahawks vs. Cardinals NFL Thursday Night Football.
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, 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)
