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Underdog Promo Code SDS: Get $50 March Madness Bonus for First Four, Round of 64 Picks

Danny Small

By Danny Small

Published:

New users can go all in on the NCAA Tournament with Underdog promo code SDS. When you sign up and play a $5 entry, you will instantly get $50 in bonus entries added to your account. Click here to start signing up.

This strictly new-user promotion provides a fantastic opportunity to build your bankroll right away, as the bonus entries can be used to make player prop picks for the Miami (OH) vs. SMU matchup, or they can be applied toward any NBA game on the schedule this week. The NCAA Tournament will really hit the ground running when the round of 64 starts on Thursday. Take a closer look at how to sign up with Underdog.

Underdog Promo Code SDS Delivers $50 March Madness Bonus

Before diving into the player projections for the Miami (OH) and SMU clash, take a moment to review the core details of this welcome offer. Using the designated promo code ensures you lock in your bonus entries to start building your bankroll right from tip-off.

Underdog Promo CodeSDS
New User OfferPlay $5, Get $50 Bonus Entries
Terms and ConditionsNew players only, 18+, must be a resident of a legal state. 21+ in AZ, MA, and VA. 19+ in AL and NE.
Bonus Last Verified OnMarch 18, 2026

The Underdog promo code unlocks a premier welcome offer for college basketball fans looking to elevate their game-day experience. By simply signing up and playing a $5 entry, new Underdog customers will instantly receive $50 in bonus entries. This guaranteed bonus provides an immediate boost to your account, giving you additional flexibility to explore various player markets without needing to wait for your initial entry to settle.

To take advantage of this lucrative promotion, you must be a first-time player creating an account on the platform. Furthermore, this offer is exclusively eligible for new Underdog customers who meet the standard age requirements and are physically located in a participating state. Once these basic legal and jurisdictional criteria are met, your $50 in bonus entries will be instantly credited and ready to deploy on the hardwood.

How to Use This College Basketball Promo

It won’t take long for players to sign up and start reaping the rewards on Underdog. This is an opportunity for players to start winning bonuses on the First Four games on Wednesday night. From there, new users will have a bankroll to use on the rest of the NCAA Tournament. Take a look at a few of the markets for the SMU-Miami (OH) matchup:

  • Jaron Pierre
  • Total Points: 18.5
  • Total Rebounds: 5.5
  • Total 3-Point Field Goals: 3.5
  • Samet Yigitoglu
  • Total Points: 11.5
  • Total Rebounds: 7.5
  • Antwone Woolfolk
  • Total Points: 11.5
  • Total Rebounds: 6.5
  • B.J. Edwards
  • Total Points: 11.5
  • Total Rebounds: 5.5
  • Corey Washington
  • Total Points: 12.5
  • Total 3-Point Field Goals: 1.5

While seasonal statistics are not currently available to highlight recent trends for these players, the market projections tell a clear story about expected game flow. B.J. Edwards is projected to crash the glass successfully, with his rebounding total set at a competitive 5.5 boards. On the perimeter, Jaron Pierre is facing a steep climb to hit four three-pointers, with expectations leaning heavily toward a lower output than his 3.5 projection. Additionally, market indicators suggest a potentially lower-scoring script for Pierre overall regarding his 18.5 points line. Meanwhile, Corey Washington’s three-point projection sits at a much tighter 1.5 makes, offering a compelling focal point for fantasy entries.

How to Activate Underdog Promo Code SDS

Ready to get in on the action for the Miami (OH) vs. SMU matchup? Claiming your bonus is a simple process. First, you must be a new user and meet the standard age and region requirements for your jurisdiction. Head over to the platform to create and register your account using standard personal information. When prompted, be sure to enter promo code SDS, this is required to lock in the offer.

Once your account is active, make a deposit of at least $5 using one of the secure methods provided. To officially activate your $50 in bonus entries, simply play a $5 entry.

When building your entry, Underdog gives you two different ways to play:

  • Standard Entry: Select 2+ picks for your entry. This option triggers the largest potential payout, but keep in mind that all legs must hit for your ticket to cash.
  • Flex Entry: Select 3+ picks and choose the flex option. While the maximum payout is lower, a flex entry provides a built-in safety net, allowing you to still receive some winnings even if a leg is incorrect.
Danny Small

Commercial content writer for Sportradar. Never had the makings of a varsity athlete.

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