New users who register with the Underdog promo codeTOPACTION can unlock $75 in fantasy bonus entries after creating and submitting a qualifying lineup. The Play $5, Get $75 in fantasy bonus entries promotion keeps things simple: enter a $5 lineup, and Underdog awards the $75 bonus regardless of whether your entry wins or loses. That guaranteed value makes it an easy entry point into DFS action featuring NCAAB and Winter Olympics picks.
Check the table below to confirm that the Underdog promo code TOPACTION is available in your state. After registering and submitting a $5 lineup, Underdog automatically credits your account with $75 in bonus entries, giving you immediate flexibility to build DFS lineups using picks from Houston vs. Iowa State NCAAB and Winter Olympics events.
| Underdog Promo Offer | DFS States Available | Underdog Promo Code Sign-Up Link |
|---|---|---|
| Play $5, Get $75 in Fantasy 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: Build an Entry With Houston vs. Iowa State NCAAB, Winter Olympics Picks
Sign up using the Underdog promo code TOPACTION and submit a $5 DFS entry featuring picks from the Houston vs. Iowa State NCAAB matchup or available Winter Olympics contests. After your entry is placed, Underdog Fantasy credits your account with $75 in bonus entries regardless of your lineup’s outcome. That guaranteed reward makes the Play $5, Get $75 offer one of the strongest DFS promotions available today.
To create a lineup, select between two and eight players and predict whether each will finish Higher or Lower than their listed stat projection. Increasing the number of selections raises the payout multiplier, giving your entry greater upside potential.
The example below demonstrates how to build a lineup using NCAAB picks from Houston vs. Iowa State alongside selections from the Winter Olympics. Once registered with the Underdog promo code TOPACTION, you can follow this structure or design your own entry to pursue a bigger payout on one of today’s leading DFS platforms.
- Kingston Flemings to get "Higher" than 15.5 points (CBB)
- Auston Matthews to get "Higher" than 0.5 goals (Winter Olympics)
- Joseph Tuger to get "Lower" than 5.5 rebounds(CBB)
After locking in your selections with the Underdog promo code TOPACTION, choose the entry format that best aligns with your preferred level of risk. A Standard Entry delivers the highest payout potential but requires every pick in your lineup to hit. A Flex Entry, on the other hand, lowers the overall multiplier while providing added protection by allowing one incorrect selection.
For example, a three-pick Standard Entry pays out 6x your stake when all picks are correct. If you submit that same lineup as a Flex Entry, the payout structure adjusts — returning 3x your stake if every pick hits or 1x your entry if one selection misses. This format offers a safety net while still preserving meaningful upside.
How to Sign Up with Underdog and Snag $75 Bonus for NCAAB, Winter Olympics Picks
Follow the steps below to create an account with Underdog, enter the Underdog promo code TOPACTION, and activate the welcome offer for NCAAB and Winter Olympics picks today:
- Click the Underdog promo code TOPACTION link or select any sign-up module on this page to start the registration process.
- Complete account setup by providing the required personal information.
- Verify that the Underdog promo code TOPACTION appears in the promo code field before finalizing your sign-up.
- Fund your account with a minimum $10 deposit using one of Underdog’s supported payment options.
- Submit your lineup using NCAAB picks from Houston vs. Iowa State, the Winter Olympics, or any available sport. Once entered, Underdog will automatically credit your account with $75 in fantasy bonus entries.
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) with Must be 18+ (21+ MA & AZ, 19+ AL, NE) and present in a state where Underdog operates. subject to change. Terms apply.
