Sign up now using the Underdog promo code TOPACTION to unlock a $100 welcome bonus. Register today, Tuesday, November 18, 2025, and enter a $5 lineup using picks from tonight's NBA, NHL, and college basketball games, and get $100 in bonus entries no matter your lineup outcome.
Use the Underdog promo code TOPACTION sign-up link below to claim your welcome bonus from one of the top daily fantasy sports apps now.
Underdog Promo Code TOPACTION Details
| Underdog Welcome Offer | DFS States Available | Underdog Promo Code |
|---|---|---|
| Play $5, Get $100 in Bonus Entries | AL, AK, AR, CA, 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 Promo Code TOPACTION: Enter $5 Lineup for $100 Bonus
Now that you've locked in the Underdog promo code TOPACTION, it's time to enter your first lineup. Select any player projection and choose "Higher" or "Lower." As you add more picks, you can potentially earn a larger payout. The below sample lineup is from Cowboys vs. Raiders Monday Night Football.
In my NFL example below, I have a three-pick lineup, so I must choose between the Standard and Flex options. With the Standard lineup, I get a 6x payout if every pick wins. The Flex entry offers a 3x payout with a perfect lineup, or I get my $5 stake back with a 2-for-3 lineup.
| Player | Team | Underdog DFS Pick |
|---|---|---|
| Ashton Jeanty | Las Vegas Raiders | Over 16.5 Receiving Yards |
| Geno Smith | Las Vegas Raiders | Over 1.5 Passing Touchdowns |
| Dak Prescott | Dallas Cowboys | Under 259.5 Passing Yards |
By entering any $5 lineup with the Underdog Fantasy promo code TOPACTION, you get $100 in bonus entries today.
Underdog Promo Code TOPACTION: Sign-Up Steps on Tuesday, Nov. 18
Follow the steps below to claim the Underdog promo code TOPACTION and make your first deposit and lineup today:
- Step 1: Use the Underdog promo code TOPACTION 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 for a play $5, get $100 in bonus entries offer.
- Step 5: Agree to the Underdog Terms of Use and Privacy Policy. Confirm you are at least 18 years old (19+ in Alabama/Nebraska, 21+ in Massachusetts/Arizona/Virginia).
- Step 6: Click "Sign Up."
- Step 7: Make your first deposit of $10+.
- Step 8: Create your first entry at Underdog 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 operates. Terms apply. 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).
