Underdog Fantasy Review 2026: Best Ball, Pick’em & Big Bonus

Few names in American sports gaming have moved as fast as Underdog. What started as a scrappy best ball app has grown into one of the most recognizable platforms in the country, and 2026 has been its busiest year yet. Between launching its own federally regulated exchange, agreeing to a billion-dollar acquisition, and refining its fan-favorite contests, Underdog has given players plenty to talk about.

This Underdog Fantasy review for 2026 covers everything US players need to know. It breaks down the contest formats, the welcome offer, the mobile app, banking, state availability, and the big changes that shaped the platform this year. Whether someone is a seasoned best ball drafter or a casual fan looking for a simple way to add excitement to game day, this guide explains where Underdog shines and what to keep in mind.

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Underdog Fantasy Review 2026: The Quick Verdict

Underdog remains one of the best-designed sports gaming apps in the United States. Its biggest strengths are a clean, fast mobile experience, an industry-leading best ball product, and flexible pick’em formats that suit both beginners and experienced players.

The 2026 version of Underdog is also broader than ever. Prediction markets now sit alongside fantasy contests in the same app, which gives fans in many states new ways to play. The trade-off is that product availability varies more by state than it used to, so players should check what is offered where they live.

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The Story Behind Underdog

Underdog was launched in 2020 by founder and CEO Jeremy Levine. From the start, the company focused on making fantasy sports simpler and more fun, rather than copying the salary-cap model that dominated the industry.

That approach paid off quickly. The Fantasy Sports & Gaming Association named Underdog the best product experience from 2022 through 2024, and it won Fantasy Sports Business of the Year in both 2022 and 2023. The company also attracted high-profile backers, including BlackRock, Mark Cuban, and Kevin Durant.

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What’s New at Underdog in 2026

For anyone who hasn’t opened the app in a while, 2026 brought several major developments. These changes explain why Underdog looks and feels a bit different today than it did a year or two ago.

Underdog Launched Its Own Prediction Market Exchange

The headline news of the year arrived in July. On July 18, 2026, Underdog launched its own prediction market exchange, wholly owned by the company, licensed by the Commodity Futures Trading Commission (CFTC), and available right inside the existing Underdog app.

The road there was methodical. In March 2026, Underdog acquired a Designated Contract Market and a Derivatives Clearing Organization. Combined with its status as a registered Futures Commission Merchant, that made it the first sports company to hold the complete prediction market license stack. Before going in-house, Underdog offered prediction markets through partner exchanges such as Crypto.com and Kalshi.

The product has gained serious traction. Since entering prediction markets in September 2025, Underdog has grown into the third-largest regulated US prediction market venue by notional volume, trailing only Kalshi and Robinhood.

A Major Acquisition by IG Group

Underdog’s rapid growth also caught the attention of global finance. UK-based IG Group agreed to acquire Underdog in a deal worth up to roughly $1.3 billion, built on an upfront enterprise value of about $1.1 billion plus an earnout. The deal remains subject to regulatory approvals and customary closing conditions.

For everyday players, the deal signals long-term stability and deep financial backing. IG has said it aims to more than double its US revenue and grow its US monthly active customers more than tenfold, which points to continued investment in the product and promotions.

Goodbye to the Sportsbook

Some readers searching for an Underdog sportsbook review may be surprised to learn that the company no longer runs one. Underdog closed its North Carolina sportsbook in mid-December 2025 to concentrate on daily fantasy sports and prediction markets.

The company handled the exit in a customer-friendly way. Unused bonus funds were converted into withdrawable cash, and open futures wagers were paid out at their maximum amount. Today, Underdog’s energy is focused squarely on fantasy contests and prediction markets.

Drafts Paused in Seven States

The one notable step back in 2026 involved Drafts. Right after the NFL season kickoff, new Drafts entries stopped in Massachusetts, Maryland, Michigan, Mississippi, New Jersey, Pennsylvania, and Ohio, while drafts already entered played out and paid normally.

The reason is regulatory rather than product-related. Those states took the view that a company can hold a fantasy sports license or offer CFTC-licensed event contracts, but not both, and Underdog chose the federal product. Levine has said he is optimistic about bringing Drafts back to those players, so this may not be permanent.

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Underdog Games and Contests Explained

The real heart of any Underdog Fantasy review is the gameplay. Underdog offers four ways to play, namely Predictions, Pick’em, Drafts, and Champions, and each one caters to a slightly different type of sports fan.

Pick’em: Simple, Fast, and Fun

Pick’em is the format most new users try first, and it’s easy to see why. Players choose athletes and predict whether each will go “Higher” or “Lower” than a projected stat line. Entries can include up to eight players.

Underdog has built several creative variations on top of the basic format:

• Rivals: Players pick which of two athletes will post a higher number in a given stat category. It’s a fun head-to-head twist that rewards sharp matchup analysis.
• Streaks: This mode starts with a correct two-pick entry and continues one pick at a time. A completed Streak means hitting the opening pair and then nine single picks in a row, with payouts that can reach 1,000x.
• Ladders: Instead of a single over/under, each pick has three rungs, which adds strategy and bigger payout potential.

Pick’em entries are also budget-friendly. Entry fees start at just $1, with lines available across the NBA, NFL, college basketball, PGA, MLB, and more.

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Champions: Peer-to-Peer Pick’em

Not every state permits traditional house-style pick’em, and Champions is Underdog’s smart solution. It plays much like pick’em, but users compete against other users instead of the house, a peer-to-peer setup that fits the rules in many states.

The format keeps the same easy Higher/Lower gameplay while adding a competitive leaderboard element. Players can even mix standard pick’em selections with Rivals picks in a single Champions contest, which keeps entries varied and interesting.

👉 Take on other fans in Underdog Champions today.

Drafts and Best Ball Mania

Best ball is where Underdog built its reputation, and it remains the gold standard in the industry. In Drafts, users snake-draft a roster once, whether for a daily slate, a week, or a full season, and the platform automatically starts the highest-scoring eligible players. There are no waivers and no weekly lineups to set.

That set-it-and-forget-it design is perfect for busy fans. Players get the thrill of a live draft without the weekly grind of traditional season-long leagues.

The marquee event is Best Ball Mania. For the 2026 NFL season, Best Ball Mania VII kept a $25 entry and a $15 million total prize pool, with $2 million going to the winner and $1 million to second place. Underdog also runs a wide range of smaller tournaments. One fan favorite is The Eliminator, where half the field is cut in Week 1 before head-to-head play takes over for the rest of the season.

Best ball isn’t limited to football, either. Underdog has offered contests for golf majors, the NFL playoffs, and even soccer. For the 2026 World Cup, it rolled out soccer best ball contests where players drafted a 12-man squad and the site handled lineup decisions automatically.

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Underdog Predict: Trading on Sports Outcomes

Underdog’s newest product lets users trade event contracts on game outcomes and player performances. Unlike fixed-odds betting, prices are driven by the market itself. With its own exchange and clearinghouse, Underdog Predict operates under direct federal oversight rather than relying on a partner.

One major advantage of Predict is its broad reach. It is available in 46 states, with Arizona, Michigan, Nevada, and New York being the exceptions. That includes large markets where traditional sports betting is not legal, such as California and Texas.

Players should note that prediction markets carry real financial risk, much like any form of trading. It’s wise to start small and understand how contract pricing works before committing larger amounts.

Sports Coverage

Underdog covers all the major American leagues and then some. Fans will find contests for the NFL, NBA, MLB, NHL, college football, college basketball, golf, tennis, MMA, soccer, and esports, depending on the season and state.

The depth of coverage is a quiet strength. During the slower summer months, for example, Underdog keeps players engaged with baseball, tennis, golf, and international soccer contests. When fall arrives, the NFL and college football schedules take center stage with hundreds of daily props and multiple best ball tournaments.

Underdog Welcome Bonus and Promotions

Underdog typically offers new users a low-risk entry point. A common offer lets new players place a $5 fantasy entry and receive $50 in bonus entries once that first entry is placed, with the bonus usable on fantasy contests.

The exact amount can vary depending on the time of year, the referral partner, and the state. Some promotions have offered as much as $75 in bonus entries, so it’s worth comparing offers before signing up. Players should also know that promotional funds are generally meant for fantasy contests rather than standalone prediction trades.

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Ongoing Promotions for Existing Players

Underdog does a solid job of rewarding loyal users after the welcome bonus is gone. Popular recurring promos include:

• Pick’em Rescues: If a selected player gets injured during a game, the platform may offer a “Rescue” and refund the entry.
• Gimme Pick Tokens: These tokens can be applied to a Pick’em selection so it counts as a win regardless of how the athlete performs.
• Pick’em Specials: These adjust an athlete’s projection in the user’s favor.
• Supercharge: This lets players apply a boost to eligible Pick’em entries after submission.
• Free Picks Contests: Users can enter select Champions contests for free with a chance to win prizes.
• Refer-a-Friend: Users can earn bonus entries for bringing friends onto the platform.

The Underdog App and User Experience

Underdog’s mobile app is arguably the best in the fantasy sports industry. The interface is clean, fast, and intuitive, which explains why it holds ratings of around 4.8 out of 5 on iOS and 4.6 out of 5 on Android.

Building an entry takes only a few taps. Player cards display projections, recent performance, and matchup context in a clear layout, while the bottom navigation makes it easy to switch between Pick’em, Drafts, and Predictions. Live entry tracking updates in real time, so watching a game with an active pick’em entry feels genuinely exciting.

The best ball draft room deserves special praise. Drafts run smoothly with clear timers, rankings that are easy to customize, and a queue system that keeps fast drafts manageable. For serious drafters entering dozens of teams, this polish makes a real difference.

The desktop site is also solid, though most players will likely prefer the app. Underdog has always designed with phones in mind first, and it shows.

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Community and Content

Underdog’s community is one of its hidden advantages. The brand has built a loyal following through its social media presence, news alerts, and partnerships with fantasy analysts. Many best ball experts share strategy content specifically built around Underdog’s formats, which makes it easier for newcomers to learn.

Banking: Deposits and Withdrawals

Underdog supports the payment methods most US players expect. Deposits can be made in the app by debit card, Trustly, or Apple Pay. Withdrawal options have included PayPal, Trustly, Paysafecard, and Intrachecks.

Here are a few practical tips for smooth banking:

• Complete identity verification early, since withdrawals require a verified account.
• Use the same method for deposits and withdrawals when possible to speed up processing.
• Keep an eye on the minimum withdrawal amount shown in the cashier.
• Remember that bonus entries usually aren’t withdrawable until they’re played through and converted into winnings.

Withdrawal speeds are generally competitive, with e-wallets and Trustly typically being the fastest options. First-time withdrawals may take a little longer while verification is finalized.

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Where Is Underdog Legal in 2026?

State availability is the single most important thing for US players to check. Underdog’s product mix depends heavily on local laws, so the experience in Texas may look different from the experience in Florida or Pennsylvania.

Here’s the general picture as of fall 2026:

• Prediction markets are available in most of the country, with the main exclusions being Arizona, Michigan, Nevada, and New York.
• Pick’em is offered where house-style fantasy contests are permitted.
• Champions fills the gap in states that require peer-to-peer play.
• Drafts remain available in many states, but new entries are paused in Massachusetts, Maryland, Michigan, Mississippi, New Jersey, Pennsylvania, and Ohio.

A few states have taken firmer stances. Arizona regulators moved against Underdog’s fantasy license over its prediction market activity, and the company previously exited New York after a settlement with the state’s Gaming Commission.

The easiest way to confirm availability is to open the app with location services enabled. Underdog uses geolocation to show exactly which products a player can access from their current location. Age requirements vary as well, with 18+ being standard in most states and higher minimums in some.

👉 See what Underdog offers in your state and sign up now.

Safety, Regulation, and Responsible Play

Underdog is a legitimate, established company, and its prediction market arm now operates under direct federal oversight from the CFTC. Its fantasy products are licensed or registered in the states that require it. Like every reputable operator, Underdog uses identity verification and geolocation to protect accounts and keep play legal.

Players should be aware that the legal landscape around prediction markets is still evolving. Underdog has gone to federal court against five states, seeking to stop them from shutting down its sports prediction markets. Products could shift as courts and regulators weigh in, so staying informed is wise.

Underdog has also made responsible gaming a visible priority. Its responsible gaming fund has invested in the Game Safety Institute, and the company has also backed the responsible gaming firm idPair. In the app, users can set deposit limits, entry limits, and take breaks or self-exclude.

Anyone who feels their play is becoming a problem can call 1-800-GAMBLER for free, confidential support.

Underdog Pros and Cons

No platform is perfect, but Underdog’s strengths clearly outweigh its weaknesses for most players.

Pros:

• The best best ball product in the industry, led by the $15 million Best Ball Mania
• Excellent, award-winning mobile app with a clean design
• Flexible pick’em formats, including Rivals, Streaks, and Ladders
• Prediction markets available in most US states through its own CFTC-licensed exchange
• Low entry fees, starting at $1 for pick’em
• Frequent promotions such as Rescues, Specials, and Gimme Picks
• Strong financial backing and an engaged player community

Cons:

• Contest options can differ slightly by state, and the app clearly shows what’s available in each location
• Focuses on fantasy contests and prediction markets rather than a traditional sportsbook
• Welcome bonus entries are tailored for fantasy contests, where most new players start anyway

How Underdog Compares to Competitors

Underdog’s closest rival is PrizePicks, which also specializes in player prop pick’em contests. Many analysts consider Underdog the more complete package, since it pairs a similar pick’em format with Rivals head-to-heads, more picks per entry, and a top-rated best ball product.

Against DraftKings, the comparison depends on preference. DraftKings is strong in salary-cap DFS and also runs large best ball tournaments. However, Underdog’s best ball community, draft room experience, and prize structure remain the benchmark that others are measured against.

In prediction markets, Underdog competes with Kalshi, Robinhood, and PrizePicks Predict. Its biggest advantage is that sports fans can trade, draft, and make pick’em entries without ever leaving one familiar app.

How to Sign Up at Underdog

Getting started takes only a few minutes. The process is straightforward:

1. Download the Underdog app from the App Store or Google Play, or visit the website.
2. Tap “Sign Up” and enter a valid promo code if one is available.
3. Provide basic personal details, including name, email, date of birth, and address.
4. Complete identity verification and allow location access.
5. Make a first deposit using a debit card, Trustly, Apple Pay, or another supported method.
6. Place a qualifying entry to unlock the welcome bonus.

Underdog Fantasy FAQ

Is Underdog Fantasy legit?

Yes. Underdog has operated since 2020, has won multiple industry awards, and now runs a CFTC-licensed prediction market exchange. It is one of the most established names in US fantasy sports.

Does Underdog still have a sportsbook?

No. Underdog closed its only sportsbook in North Carolina in December 2025 and now focuses on fantasy contests and prediction markets.

What is Best Ball Mania VII?

It’s Underdog’s flagship NFL best ball tournament for 2026, featuring a $25 entry fee, a $15 million prize pool, and a $2 million first-place prize.

Can Underdog bonus entries be used on prediction markets?

Generally, no. Fantasy bonus entries are designed for fantasy contests, and standalone prediction trades typically require real funds.

What’s the minimum age to play on Underdog?

Most states require players to be 18 or older, but some states set a higher minimum age. The app will confirm eligibility during signup.

Who owns Underdog?

Underdog was founded by Jeremy Levine. In July 2026, UK-based IG Group agreed to acquire the company in a deal worth up to $1.3 billion, pending regulatory approvals.

Final Verdict: Is Underdog Worth It in 2026?

Underdog enters late 2026 as one of the most exciting and innovative platforms in American sports gaming. Its best ball product is still unmatched, its pick’em formats are fun and flexible, and its mobile app sets the standard for the industry. The addition of a fully owned prediction market exchange gives fans in most states even more ways to engage with the games they love.

The main caveat is that the experience varies by location, so players should check what is available in their state before diving in. For anyone who enjoys drafting, picking props, or following games with something on the line, Underdog is well worth downloading this season. As always, players should set limits, play within their budget, and treat it as entertainment first.

👉 Sign up at Underdog today and claim your welcome offer.