Best MLB Prediction Market Sites in 2026

Quick facts about baseball event trading

• Our best MLB prediction market sites are Kalshi, Polymarket US and Crypto.com.
• These three sites claim that their event contracts run under CFTC regulations.
• Baseball contracts such as World Series winner and division champs are offered at each of these sites, but contract selection varies between them.
• Contracts can trade between $0.01 and $0.99, with correct positions settled at $1 per contract.

How does baseball event trading work?

This contract format should look familiar if you’ve already browsed through the best NFL prediction market sites. As opposed to trading on football outcomes, the focus here is trading on baseball events like division races, single games, awards and the World Series.

For example, at Kalshi, Polymarket US and Crypto.com, a prediction market on the World Series winner is listed among the available event contracts. You can also make a prediction on a division winner, whether a team qualifies for the playoffs and how many games will be won in a series or in the regular season, among other options. Note though that the selection of available contracts differs from one site to the next.

With the facilitation provided by these sites, buying a "Yes" contract confirms you are backing the event to happen. A "No" contract signifies that you believe the opposite outcome will take place. Usually, contracts at these sites trade between $0.01 and $0.99. Think of these contact prices as indicators of the market's implied probability. However, remember that the prices these sites display can be affected by both liquidity and the spreads offered.

As news breaks, such as injuries or sudden team performance improvements, at an MLB game, the prices go up or down. Once your prediction is confirmed to be correct, each share of your contract will be worth $1. Otherwise, the contract would close at $0.

Pros and cons of baseball event contracts

Here’s what we found appealing about Kalshi, Polymarket US and Crypto.com MLB sites, plus one drawback we experienced:

Pros and Cons

• CFTC-regulated prediction market sites
• Long-term and individual game prediction markets
• Possible to exit contracts before the scheduled settlement

• Available markets change throughout the MLB season

Our 3 best MLB prediction market sites

Instead of writing about brands we already know, we used the sites extensively to see how each compared. We looked at MLB markets, types of contracts, how active trading was at each of the sites and our own general experience. Some takeaways from our visit to each MLB prediction exchange were:

Kalshi - Our pick for the top pro baseball markets

Kalshi: Pros and Cons

• Regulated by the CFTC and has federal oversight
• Deepest markets and contract selections
• User-friendly website (PC and mobile)

• Legal scrutiny exists in certain US states
• Customer support can be slow during high traffic periods

Kalshi is easily among the top baseball trading sites in the United States because there's a lot to keep your eyes and hands busy in its pro baseball section. There were Futures, Win Totals, Awards (our favorite), Division, League Leader and Next Team markets. For awards, there were options such as NL Rookie of the Year Winner and AL MVP Winner.

Baseball traders in the United States can use both Kalshi's iOS and Android apps. We regularly return to Kalshi when we want to see which contracts have gone live since we last checked. The company states that it was the first exchange approved by the CFTC to offer event contracts. Sounds like a no-brainer, though. In fact, many basketball fans we've interviewed refer to the site as one of the best NBA prediction market sites.

Polymarket US – Top site for World Series trading

Polymarket: Pros and Cons

• Hundreds of crypto and network deposit routes
• Extensive help documentation
• User-friendly web platform and mobile apps

• Only 10 active video games markets

When we looked at Polymarket US, we found not 10, but 30 markets active and a combined trading volume of $1.3 million. The baseball markets were separated into Games and Props. Individual matchups and themed markets like Longball Legends and Pitchers' Duel Multi were found in the Games segment.

Props featured contracts that were for longer-term events. Some of these are World Series winner, American League champion, National League champion and Division winners, with one example being the 2026 AL West Champion market.

Crypto.com – Best crypto trading site for MLB markets

Crypto.com: Pros and Cons

• Low trading fees
• Wide range of prediction markets, including sports
• Simple Yes/No outcomes
• User-friendly app

• No welcome bonus for prediction trading

Crypto.com is of more benefit to traders with an existing account. We bought baseball contracts through its app and there's also the option to trade via the website. It follows CFTC guidelines on event contracts trading, per the company's disclosure.

Hitting the baseball tab opens you up to a world of outcomes tied to individual games as well as long-term contracts, like the Pro Baseball National League Winner 2026. Note that this brand's availability in terms of event contracts varies state by state; therefore, check whether Crypto.com offers event contracts within your locality.

Sponsored by Crypto.com – Not investment advice. Trading prediction markets and crypto involves risk, including potential loss of your stake. Consider your risk tolerance before participating. Crypto.com connects U.S. users to CDNA (regulated by CFTC) for derivatives trading. CDNA membership required. Trading may not be suitable for all—you could lose your entire investment plus fees. Past performance doesn't guarantee future results. This is not a solicitation or recommendation to trade.

In all three of the websites we reviewed, baseball event contracts fell within the following sections:

What we checked before selecting the top sites for MLB event trading

We used many of the same checks from our best Formula 1 prediction market sites guide, but baseball required us to pay attention to market variety and trading activity. These were the checks we used:

MLB market variety

The first aspect we focused on was market variety. While markets might not start and finish with just the winner of the World Series, established sites will offer more. Therefore, we looked for sites offering: individual games, division winners, awards, futures, team outcomes and other contracts that give baseball traders more ways to trade on information they have. Some of the sites that had several offerings were Kalshi, Polymarket US and Crypto.com.

Easy to find and trade event contracts

We tried to ensure that anyone new to trading MLB events would feel welcome to guess than wonder. Each site allowed us to open a market, read a contract's rules and place trades. In particular, we paid attention to how quickly we could locate baseball markets, read up on a contract, get details about settlement and put down a position without endlessly searching for necessary information.

Security and reputation

We double-checked the security measures stated on each of the sites so we could assure you that your funds, sensitive personal information and account details are well-protected before trading. To do this, we made sure the sites utilized trusted payment methods and various trading tools like two-factor authentication and responsible trading features, such as spending limits. We concluded the ranking process by looking at the user reviews submitted on various online forums by people who have used these sites.

Regulation

Location was another check we couldn't ignore. We checked each site's regulatory info and state restrictions rather than assume that access was the same everywhere. Based on our findings, signing up on Kalshi, Polymarket US, and Crypto.com depends on your state, the site, and the contract you want to trade.

Based on what we found, these sites follow CFTC rules and are approved to offer prediction market trading in US states where they are allowed.

Buying, selling and market activity

We checked for the same feature we used for our best soccer prediction market sites in the US. Being able to buy and sell as prices move was important to us, especially when baseball news changed our view before settlement.

Likewise, we reviewed trading activity on each site. More active markets usually make it easier to find buyers or sellers when we want to enter or leave a position. However, the price still depends on the market conditions at that moment.

Tips for trading at MLB prediction market sites

Baseball knowledge is great, but you still need to pay attention to contract rules and know when to enter or exit a trade. These are some of the steps to take:

How to sign up on our top three choices

Check first that you qualify. You must pass minimum age requirements and live in an allowed location. Once you fulfill those, the sign-up process on prediction markets looks something like this:

1. Click one of the banners on this page to bring you to your preferred site.

2. Locate the Sign Up or Join button.

3. The next step is to register. You’ll be asked to input your name, phone number and address and so on.

4. Complete any required verification (some sites require identity verification before you can deposit funds or start trading).

5. Select your preferred deposit option and add funds to your prediction market account.

Now your account is all set up. Visit the Sports section, choose baseball, examine the contracts and check the settlement rules. Make trades you feel good about. Note that the MLB markets can vary in selection throughout the season, so markets that look different from this guide might pop up instead.

Conclusion – Our take on MLB event trading

As far as baseball options go, we’d absolutely put our money on Kalshi. From what we could see, their MLB section had a few more options than the other two. They had not only games and individual futures like awards and league leaders, but also divisions and even win totals for teams.

So, as the season goes on, there are still plenty of markets we could pick up on. We might dabble in Polymarket US because we saw they had a lively section of "Games & Props." We’d likely skip out on Crypto.com because we do not have a Crypto.com account already. And it goes without saying: know what your state's legal limits are and know the settlement rules for each site, in addition to the specific contracts you wish to trade, before buying. Click the banners below to compare the best markets by location.

Our sports prediction market sites of choice

MLB prediction markets FAQs