Take advantage of the new Underdog promo code, TOPACTION, to unlock $100 in bonus funds on Monday, September 29, 2025. Sign up today using the Underdog promo code TOPACTION and submit a $5 lineup featuring players from Monday Night Football. Regardless of the outcome, you get $100 in bonus funds.
View the table below to see if you can access the Underdog promo code TOPACTION in your state. Click "TOPACTION" in the table to claim your sign-up bonus now.
| Underdog Fantasy Welcome Offer | States Available | Underdog Fantasy Promo Code |
|---|---|---|
| Play $5, Get $100 in Bonus Funds | 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 ranks among the top Daily Fantasy Sports (DFS) apps, offering an excellent alternative to online sports betting in many states, including Florida. Select "Higher" or "Lower" on a player projection to add a pick to your lineup. An Underdog Fantasy lineup can include up to six picks.
Don't miss your chance to make picks on Monday Night Football, where the New York Jets face the Miami Dolphins, followed by the Cincinnati Bengals taking on the Denver Broncos.
Underdog Promo Code TOPACTION: Submit Monday Night Football Lineup Now
You’ve successfully claimed the Underdog promo code TOPACTION, unlocking your welcome bonus. It’s time to create your lineup for Monday Night Football, featuring players from the Jets vs. Dolphins and Bengals vs. Broncos games. Consider star players like Ja'Marr Chase and Garrett Wilson, or opt for lesser-known talents such as J.K. Dobbins and Jaylen Waddle.
For a lineup with three or more picks on Underdog Fantasy, you must choose between the Standard and Flex entry options. The Standard lineup offers the highest potential payout, requiring all picks to win. Meanwhile, the Flex lineup provides a smaller payout for a perfect entry but allows for a profit even if one pick falls short.
Feel free to tail my lineup below or create your own for Monday Night Football. Remember to use the Underdog promo code TOPACTION or click the link in the table below to unlock your welcome bonus now.
| Player | Team | Pick |
|---|---|---|
| Tua Tagovailoa | Miami Dolphins | Higher Than 0.5 INTs Thrown |
| J.K. Dobbins | Denver Broncos | Higher Than 13.5 Longest Rush |
| Ja'Marr Chase | Cincinnati Bengals | Lower Than 22.5 Longest Reception |
Underdog Fantasy Sign-Up Steps for Monday Night Football
Follow the steps below to claim the Underdog promo code TOPACTION and make your first deposit and lineup on Monday:
- Step 1: Use the Underdog promo code TOPACTION sign-up module on this page to download the Underdog Fantasy 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 Fantasy account.
- Step 4: Enter the Underdog Fantasy promo code TOPACTION for a play $5, get $50 in bonus cash offer.
- Step 5: Agree to the Underdog Fantasy Terms of Use and Privacy Policy. Confirm you are at least 18 years old (19+ in Alabama/Nebraska, 21+ in Massachusetts/Arizona).
- Step 6: Click "Sign Up."
- Step 7: Make your first deposit of $10+.
- Step 8: Create your first entry at Underdog Fantasy with picks from the NFL or any other sport.
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)
