Register for a new daily fantasy sports account on Saturday, April 18, 2026 with the exclusive Underdog promo code TOPACTION to claim $50 in bonus entries for NBA DFS picks during the opening day of the NBA Playoffs.
Play $5 or more to unlock your $50 bonus and build entries for today’s Game 1 matchups in the NBA . Underdog remains one of the top DFS apps available across a majority of U.S. states. Claim your $50 bonus with the Underdog promo code TOPACTION by clicking on the module below.
Underdog offers a compelling alternative to traditional online sports betting. The platform operates as a DFS app where users create entries based on player projections, with each added pick increasing the potential payout multiplier.
Check out the table below for more details on where you can use the Underdog promo code TOPACTION today.
| Underdog Promo Offer | DFS States Available | Underdog Promo Code Sign-Up Link |
|---|---|---|
| Play $5, Get $50 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: $50 Bonus for NBA DFS Picks on April 18
When you sign up with the Underdog promo code TOPACTION, play $5+ and receive $50 in bonus entries to use on NBA Playoffs DFS contests. Here’s how the entry system works.
Underdog offers two entry formats: Standard and Flex. A Standard entry requires every pick to hit for a payout, while a Flex entry allows one miss while still returning a smaller payout. Standard entries offer higher upside, while Flex entries provide added safety.
Suppose you build a $5 Standard three-pick entry for today’s Game 1 slate:
- Donovan Mitchell Higher Than 26.5 Points
- Anthony Edwards Higher Than 24.5 Points
- LeBron James Higher Than 25.5 Points
Here’s how your payout would break down:
- If all picks win: You receive a $27.50 total payout ($22.50 profit + $5 entry returned) plus $50 in bonus entries
- If one or more picks lose: You still receive $50 in bonus entries
Remember, the Underdog promo code TOPACTION is available to new users in 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, and WY.
NBA Playoffs Game 1 Schedule for Saturday, April 18, 2026
- Raptors vs. Cavs — 1 p.m. ET on Prime Video (Game 1)
- Timberwolves vs. Nuggets — 3:30 p.m. ET on Prime Video (Game 1)
- Hawks vs. Knicks — 6 p.m. ET on Prime Video (Game 1)
- Rockets vs. Lakers — 8:30 p.m. ET on ABC (Game 1)
This full slate of Game 1 matchups provides multiple opportunities to build DFS entries across different player pools and game environments.
Underdog Sign-Up Steps: Saturday, April 18, 2026
Follow these steps to claim your $50 bonus with the Underdog promo code TOPACTION:
- 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 any NBA Playoffs game today.
Underdog Terms & Conditions
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. Offer not valid in MD, MI, NJ, NY, OH, and PA. 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).
