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Underdog Promo Code SOUTH: Get a $50 NBA Bonus for Knicks vs. Warriors

Alex Payton

By Alex Payton

Published:

Let’s be real, there is nothing better than turning a small play into a nice pay day. If you’re looking to build your bankroll, the Underdog promo code SOUTH lets new users sign up and play just $5 to instantly get $50 in bonus entries.

We can use this welcome offer to get in on tonight’s marquee NBA matchups, like the New York Knicks taking on the Golden State Warriors, or any other game this week. It is an easy way for first-time players to grab some extra firepower and chase bigger payouts with confidence.

Underdog Promo Code SOUTH for NBA Picks

Underdog Promo CodeSOUTH
Welcome OfferPlay $5, Get $50 Bonus Entries
Terms and ConditionsNew players only, 18+, must be a resident of legal state. 21+ in AZ, MA and VA. 19+ in AL and NE.
Date Last VerifiedMarch 15, 2026

I always tell sports fans that taking advantage of welcome offers is the smartest handicapping move you can make. The mechanics of this Underdog promo code are incredibly simple: if you are a new Underdog customer who meets the age requirements and is physically located in a participating state, just register and play a $5 entry.

Once that initial $5 play is locked in, you will instantly receive $50 in bonus entries to use across the platform. Whether you want to focus entirely on the NBA, or mix in some college basketball and NHL players, you will have the flexibility to craft the exact entries you want.

Sunday Night Markets for the Underdog Promo Code

If we’re going to build a winning entry, we need to target the right matchups. Here are the five players with the highest point over/under lines on the slate:

  • Jalen Brunson (New York Knicks) vs. Golden State Warriors: 26.5 Points (Over -105 / Under -125)
  • Deni Avdija (Portland Trail Blazers) @ Philadelphia 76ers: 22.5 Points (Over -109 / Under -121)
  • Brice Sensabaugh (Utah Jazz) @ Sacramento Kings: 21.5 Points (Over -125 / Under -105)
  • Quentin Grimes (Philadelphia 76ers) vs. Portland Trail Blazers: 17.5 Points (Over -119 / Under -111)
  • DeMar DeRozan (Sacramento Kings) vs. Utah Jazz: 20.5 Points (Over -117 / Under -112)

I’m looking right at Jalen Brunson tonight. There has been a lot of loud chatter from Knicks fans lately about his shot selection, but he just dropped 29 points and nine dimes against Indiana. Plus, he is facing a Golden State squad that is incredibly banged up—missing defensive anchor Draymond Green and Steph Curry. Golden State’s defense is surrendering 114.4 points per game, putting Brunson in a prime spot to cook at Madison Square Garden.

Then we have DeMar DeRozan, who is staring down a dream matchup against the Utah Jazz. The Jazz give up a league-worst 125.0 points per game. With Domantas Sabonis out for the season and Malik Monk sidelined, Sacramento is going to lean heavily on DeRozan’s elite shot creation. Finally, do not sleep on Deni Avdija against a Philadelphia 76ers team missing Joel Embiid and Tyrese Maxey. Avdija is enjoying a massive breakout campaign, averaging over 24 points per game.

How to Activate the Underdog Welcome Offer

Ready to get in on the action? Claiming your welcome offer is quick and easy. Click here and follow these simple steps to secure your bonus:

  1. Register Your Account: Create a new account by entering your standard personal information for verification. During the sign-up process, promo code SOUTH is required to lock in the promotion. You must be a new user and meet your state’s age and region requirements to be eligible.
  2. Make a Secure Deposit: Once your account is verified, fund your wallet by depositing at least $5 using one of the platform’s secure payment methods.
  3. Submit Your Entry: Play a $5 entry on tonight’s NBA slate in order to instantly activate your $50 in bonus entries.

When building your initial entry, you will have two distinct ways to play:

  • Standard Entry: Selecting a standard entry with 2+ picks will trigger the largest potential payout. However, keep in mind that all legs must hit for your entry to be a winner.
  • Flex Entry: If you prefer a bit of a safety net, you can choose to flex an entry with 3+ picks. With a flex entry, you can still receive some winnings even if one leg is incorrect, giving you more margin for error as the action unfolds on the court.
Alex Payton

Resident of Kentucky, Alex is a graduate from the University of Louisville and avid Cardinals fan. He also follows the New York Yankees, Indianapolis Colts, and has multiple years of experience in the online gambling industry.

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