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Underdog Rivals Rules 2026: How does Rivals Work on Underdog?

Last Updated on 03/17/2026
Fact checked by: Mike Goodpaster

Underdog is one of the leading fantasy sports platforms in the US. The site offers a variety of contests including Best Ball, Pick’em, and Battle Royale. But it’s also gaining momentum thanks to its Rivals contests.

If you’re wondering how Rivals works on Underdog, we can certainly help. This guide will give you an overview of everything there is to know. We’ll offer an explanation on how Rivals works, the basic rules of the game, and even how to register an account to get started.

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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).

Underdog Rivals explained: How it works

If you have played Underdog Pick’em before, then you will be familiar with some of the Underdog Rivals rules. It’s similar to Pick’em, but instead of choosing higher or lower based on a specific statistic, you will be selecting your players based on categories.

Some of the statistical categories include:

  • Points
  • Goals
  • Yards

Underdog Rivals rules

The Underdog Rivals rules are pretty easy to learn, even for complete beginners. Here’s a quick guide to what you need to know:

  • Rivals are based on a player vs player format
  • You can pick up to 5 players
  • You will occasionally find research available
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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).

How to create an Underdog account

Now that you know a bit more about how Rivals works on Underdog, we’ll look into getting you set up with a new account. As with any other DFS sites, you need to create an account before entering any contest. Here’s how you can register:

Download the app

As long as you’re based in one of the Underdog available states, you can head to your Google Play Store or Apple App Store to download the Underdog app. Alternatively, you can visit the website using your desktop or laptop.

Register

Select the ‘Sign Up’ button and you will be presented with a quick registration form to complete. This form requires some basic details such as your name, email, address, and contact number. You’ll also need to create a username and password. Here you can also enter our promo code GRUELTRUTH

Verify your account

Before you can access your account, it needs to be verified. You will be sent an email that contains a link, which you must click to verify your email address. Underdog may also request some additional documents from you to confirm you are who you say you are.

Deposit

Once your account has been approved, you can head to the cashier section to deposit some funds. You’ll need to deposit at least $10 into your account, but you only need to play $5 to receive your welcoome bonus of $50 in bonus entries.

Play Underdog Rivals

You’re now ready to start playing Underdog Rivals and testing out your strategies for a chance at winning some prizes. Why not check out our Underdog review to read about all the other contests you can enter?

Underdog DFS Bonus

Underdog has a welcome bonus available to new customers on the platform – Play $5, Get $55 in Bonus Entries.

It’s pretty simple and straightforward. All you need to do is sign up, make a deposit, and play $5, and Underdog will provide you with an extra $50 in bonus entries to play with!

You must be 18+ (19+ in AL, NE; 19+ in CO for some games; 21+ in AZ, MA, and VA) to participate and you have to be physically present in a state where Underdog operates. This offer not valid in MD, MI, NJ, NY, OH, and PA. Terms and Conditions apply.

Take a look at the table below to check if your state is available:

  • Alaska
  • Alabama
  • Arkansas
  • Arizona
  • California
  • Colorado
  • Florida
  • Georgia
  • Illinois
  • Indiana
  • Kansas
  • Kentucky
  • Massachusetts
  • Maryland
  • Maine
  • Minnesota
  • Missouri
  • Mississippi
  • North Carolina
  • North Dakota
  • Nebraska
  • New Hampshire
  • New Jersey
  • New Mexico
  • Ohio
  • Oklahoma
  • Oregon
  • Pennsylvania
  • Rhode Island
  • South Carolina
  • South Dakota
  • Tennessee
  • Texas
  • Utah
  • Virginia
  • Vermont
  • Wisconsin
  • West Virginia
  • Wyoming

There is help for you if you are concerned about your gaming habit. Call 1-800-GAMBLER or visit www.ncpgambling.org;

NY: Call the 24/7 HOPEline at 1-877-8-HOPENY or Text HOPENY (467369).

Pros and cons of Underdog Rivals

Pros and cons
Pros and cons
  • A new player bonus is available for Rivals
  • Easy rules for beginners
  • Not available in all US states

Conclusion – How does Rivals work on Underdog?

If you’re a beginner when it comes to fantasy sports games, then Underdog Rivals is the perfect place to start. The rules are incredibly easy to get your head around, so it won’t be long before you’re enjoying the contest. We highly favor Underdog Rivals for any beginner.

As a new player, you can even claim a generous welcome bonus of $50 in fantasy bonus entries when you play $5

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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).

Underdog Rivals rules FAQs

✅Is Underdog Rivals easy for beginners?

Yes, Underdog Rivals is incredibly easy to learn, even for complete beginners who have never played any fantasy sports before. Check out this guide for an overview of the rules and what you can expect.

📱Can I play Underdog Rivals on mobile?

Yes, Underdog Rivals is fully accessible on mobile, whether you’re using the app or website version.

🪙Is there an Underdog welcome offer for new players?

If you’re new to Underdog, then there’s a fantastic welcome bonus waiting for you of $50 in fantasy bonus entries when you play $5.

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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).
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