Underdog Launch in Missouri: Dates, News & Promos

If you are already a fan of Underdog, you might have been wondering, “Is Underdog legal in Missouri for sports betting?” We have fantastic news, as we have heard that Underdog Sports is confirmed to enter the Missouri market.

Underdog Sports has secured access to the Missouri market via a partnership with Kansas City Royals. With sports betting due to launch in the state on 1st December 2025, we are also expecting Underdog Sports to launch on this date, as one of the few that have been handpicked for the Show-Me State.

Underdog Missouri: Key Takeaways

Online sports betting has almost arrived in Missouri, with the official launch set for 1st December 2025. Underdog Sports is confirmed to be landing in the state, where sports fans can create an account to access some incredible features, including a prop-forward betting approach, familiar fantasy play, and an easy-to-use bet builder.

Underdog Sports will be open for those who are aged 21+ years old and physically located in Missouri. You can expect a range of markets, including moneylines, player props, totals, parlays, and in-play betting. With Underdog having been available in Missouri for years, you can also continue to access fantasy play.

While a welcome bonus for Underdog Sports hasn’t been confirmed, it’s expected to be available on 1st December. To get an idea of what you might expect, you can check out our full Underdog review.

When Will Underdog Be Legal in Missouri?

It has been a long road for online sports betting to be introduced in Missouri, with voters legalizing sportsbooks back in 2024. However, in October 2025, temporary approvals were given to a list of approved sportsbooks, including Underdog.

Underdog Sports was given final approval in November 2025, where Underdog confirmed that it will be accessing the Missouri market under a partnership with the Kansas City Royals with regulation by the Missouri Gaming Commission. Underdog Sports is set to go live in Missouri on 1st December 2025, where you can register an account and start wagering on your favorite sports.

How to Sign Up for an Underdog Sports Account

If you want to test the waters at Underdog Sports, you can get your account up and running in just a few minutes. Here’s how the process works, which is just like any other Missouri betting site:

1. Launch the official Underdog website by clicking the on-page links
2. Click the ‘Sign Up’ button
3. Enter a few personal details to complete the registration form
4. Enable geolocation software to confirm that you are located in Missouri
5. Verify your email address by tapping the verification link
6. Make your first deposit and claim a welcome bonus
7. Start placing your bets in the Underdog sportsbook

What Is Underdog Sports’ New User Bonus?

Just like all other online sportsbooks that are launching in Missouri, you can expect a rather lucrative welcome bonus – just like the one we found when discovering that DraftKings is legal in Missouri. However, Underdog Sports has not yet confirmed its new user bonus, so you will have to wait until December to find out the full details.

The word is that Underdog Sports might be crediting new users with a match deposit bonus, which will double your initial deposit. However, the size of this bonus is yet to be confirmed. Either way, you can expect a pretty decent bonus to get the ball rolling.

Underdog Sports: Timeline for Launching in Missouri

If you have been keeping an eye on the latest updates on sports betting in Missouri, you will know that Underdog Sportsbook has been in the works for some time. Here’s a quick overview of the timeline now that Underdog is legal in Missouri:

Conclusion: Underdog Is Legal in Missouri from December 2025

You might already be aware that Underdog has been available in Missouri for many years. However, you can use Underdog in Missouri from 1st December 2025 for online sports betting, too. With Underdog expanding into online sports betting, fans will be excited to see what’s to come.

While the welcome bonus hasn’t yet been revealed, the site will be ideal for those who prefer props-style betting, as this is set to be the approach of Underdog. You can also expect to find a range of standard sports betting markets, including moneylines, parlays, totals, and live betting, just to name a few. If you are ready to get started as soon as Underdog is available in Missouri, you can do so by tapping the promotional banners on this page.