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

Last Updated on 11/06/2025
Fact checked by: Graham Stevans

Want to put your football knowledge to the ultimate test? Underdog Fantasy Rivals gives you the perfect chance to do that, and in this short guide, we will explain exactly how.

This article covers the key Underdog Rivals rules so you know exactly how the game works. Not only that, but we will give you some expert tips for playing Underdog Rivals and reveal how you can claim a fantastic bonus when you sign up at Underdog.

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Pros and cons of Underdog Fantasy Rivals

Underdog Fantasy sports mobile
Pros and cons
  • Test your NFL knowledge
  • Simple gameplay
  • Win cash prizes
  • Games are often unpredictable

Pre game prep: A quick guide to Underdog Fantasy 

Underdog Fantasy is the fastest-growing fantasy app in the US. The list of Underdog Fantasy legal states is growing rapidly, and you can now play at Underdog from over 30 of them.

Underdog offer fantasy games covering popular sports such as football, baseball and soccer. The contests at Underdog differ from those found at other daily fantasy sports sites. Make sure you check out our full Underdog Fantasy review for details of these contests. In this guide, we are going to focus on just one game - Underdog Fantasy Rivals.

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Gameday: How does Rivals work on Underdog?

Underdog Fantasy Rivals is based on a specific stat relating to two rival players. You have to choose which of the players will achieve the higher stat in their upcoming game. For example, a Rivals entry could be ‘Dak Prescott vs Russell Wilson’. You have to predict which quarterback will achieve the higher passing yards total in their next game.

Underdog Rivals rules require you to make between two and five predictions when you enter a contest. If you get all of your higher or lower predictions correct, you win a cash prize. Here are the prizes you can win:

Number of Rivals entries Prize
2 3x your stake
3 6x your stake
4 10x your stake
5 20x your stake

A winning gameplan: Ultimate tips for playing Underdog Fantasy Rivals

Underdog Fantasy Rivals is a lot of fun to play, but finding winning entries requires plenty of skill and sound judgment. To help you out, our experts have put together three ultimate tips:

Play the matchups

Joe Burrow is clearly a better quarterback than Gardner Minshew, but that does not necessarily mean that he is going to throw for more yards in his next game. What if Burrow is playing against an elite defense and Minshew is facing an injury-ravaged secondary? Suddenly the chances of Minshew achieving the higher stat line seem pretty good. Always look at the opposition before making your Underdog Rivals decisions.

Assess the conditions

Similarly, if Burrow’s game is expected to be played in a snowstorm or in 40mph winds, that will reduce the chance of him putting up a big stat line. On the other hand, if Minshew is playing in a dome, then he doesn’t need to worry about any inclement weather. Make sure you read weather reports and consider the venues when playing Underdog Rivals.

Consider the supporting cast

You also need to consider who Burrow and Minshew will be throwing the ball to. If the Bengals are missing some key receivers, then it makes it harder for Burrow to complete big plays. Always read injury reports and team news when making your Rivals picks. Remember: sometimes the obvious answer isn't the best option.

The ultimate trade: The Underdog Fantasy new player offer

If you enter a valid promo code when joining the Underdog Fantasy app, you can claim an Underdog Fantasy deposit match and a Pick’em Special.

  • The new player deposit match gives you a 100% bonus on your first deposit of up to $100.
  • The Pick’em Special gives you a specific player that you can add to your first Pick'em roster. This player will have a very skewed stat line attached to them, giving you a very easy Pick’em choice to make.

Underdog Fantasy Rivals: A game to remember

Underdog Rivals is a simple, but hugely enjoyable game that really tests out your American football knowledge. And thanks to the excellent new player offer at Underdog, you can get a healthy bonus to use on your first few Rivals entries. Just make sure you have a firm understanding of Underdog Rivals rules before playing and remember to read our expert tips before submitting your entries. Good luck!

Underdog Rivals rules FAQs

💭 How does Rivals work on Underdog?

Underdog Rivals requires you to choose which of two players will achieve a higher stat line in their upcoming game. To get the full lowdown on Underdog Rivals rules, make sure you read our full guide. 

🧮 Is there a promo code for Underdog Rivals?

If you apply an Underdog Fantasy bonus code when you join the site, you can claim an exclusive bonus. Full information on this can be found in our comprehensive Underdog review.

🤔 What is the best strategy for Underdog Rivals?

The best way to make your Underdog Rivals picks is to research areas such as weather conditions, injury reports and team news. Our Underdog Rivals guide has expert guidance on how best to play the game.

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