Sign up for a new daily fantasy sports account on Tuesday, April 21, 2026, with the exclusive Underdog promo code TOPACTION to claim $50 in bonus entries for NBA DFS picks on any game. Tonight’s NBA Playoffs slate includes 76ers vs. Celtics at 7 p.m. ET on Peacock (Game 2), Trail Blazers vs. Spurs at 8 p.m. ET on NBC (Game 2), and Rockets vs. Lakers at 10:30 p.m. ET on NBC (Game 2). This offer stands out as one of the best NBA DFS promo options available today.
Play a $5+ initial entry to unlock your $50 bonus and begin building lineups across multiple NBA Playoffs contests. Underdog remains one of the top DFS apps available in most U.S. states, giving users a flexible way to engage with player-based predictions. Claim your bonus with the Underdog promo code TOPACTION by clicking on the module below.
Underdog provides a strong alternative to traditional online sports betting by focusing on player projections instead of game outcomes. Users create NBA entries by selecting “Higher” or “Lower” on player stats, with each added pick increasing the overall payout multiplier.
Check out the chart below for details on where you can use the Underdog promo code TOPACTION for picks on the NBA Playoffs:
| 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 ACTION: $50 Bonus for Playoffs from Best NBA DFS Promo
Register with the Underdog promo code TOPACTION and play a $5+ entry to receive $50 in bonus entries. These can be used across any NBA Playoffs matchup, including 76ers vs. Celtics, Trail Blazers vs. Spurs, and Rockets vs. Lakers.
Let’s break down how entries work using an example from tonight’s slate:
Underdog offers two formats:
- Standard Entry: All picks must win to receive the full payout.
- Flex Entry: Allows one loss, in exchange for a reduced payout.
Here’s an example of a $5 Standard entry (4.7x payout multiplier) built from NBA Playoffs picks:
- Jayson Tatum Higher Than 28.5 Points
- Victor Wembanyama Lower Than 28.5 Points
- LeBron James Higher Than 25.5 Points
Here’s how the payout works:
- If all picks win: You receive $23.50 total ($18.50 profit + $5 entry back) plus $50 in bonus entries
- If one or more picks lose: You still receive $50 in bonus entries
The Underdog promo code TOPACTION is accessible to new users in the following states: 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.
Underdog Sign-Up Steps for NBA Playoffs on Tuesday, April 21, 2026
Follow these steps to claim your $50 bonus with the Underdog promo code TOPACTION ahead of the NBA Playoffs today:
- Step 1: Click this link or module to download the Underdog app.
- Step 2: Create a username and password.
- Step 3: Enter your email, date of birth, and required personal information.
- Step 4: Input the Underdog promo code TOPACTION and play a $5+ entry.
- Step 5: Agree to the Terms of Use and Privacy Policy.
- Step 6: Complete account registration.
- Step 7: Deposit at least $10.
- Step 8: Build your first NBA Playoffs entry.
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).
