What Underdog Fantasy Is
Underdog launched in 2020 with a simple thesis: drafting is the most fun part of fantasy sports, so build a platform around it and skip the weekly grind. Five years later, that thesis has paid off — Underdog hosts the biggest fantasy football tournament in the industry and has become the platform of choice for traditional fantasy players who want to compete for real money without running a full season-long ESPN league.
It now offers three real-money products: Drafts (snake-style, including Best Ball), Pick'em (over/under player props in eligible states), and Champions (head-to-head best-ball matchups). Drafts are the flagship product.
How Underdog Drafts Work
The signature format is best-ball. Here's how it works:
- You join a draft pool (anywhere from 6 to 12 players for typical contests, or up to 6 for tournament entries).
- You take turns picking real NFL or NBA players in a snake draft (round 1 goes 1–12, round 2 reverses 12–1, and so on).
- Once the draft is over, you're done. The platform automatically starts your highest-scoring players each week — no lineup decisions required.
- Your team accumulates points across the regular season. Top teams advance through playoff rounds in tournament-style contests.
This is the killer feature for casual players. There's no weekly lineup management. No "should I start Mahomes against this defense" decision Tuesday night. You draft once and watch the season play out.
Best Ball Mania: The Marquee Event
Best Ball Mania is Underdog's flagship tournament and the largest fantasy football tournament in the industry. The 2025 edition (Best Ball Mania VI) ran a $15 million guaranteed prize pool with a $25 entry and a $2 million top prize. The 2026 edition (kicking off in summer 2026 for the upcoming NFL season) is expected to be even larger.
The tournament structure: hundreds of thousands of 12-person drafts feed into weekly cuts during the NFL season. Survive each weekly cut and you advance to the next round, with the top finishers from the regular season qualifying for a winner-take-most playoff bracket in weeks 15–17.
Even if you don't enter the headline tournament, smaller best-ball contests (under $20 entry) run continuously throughout the spring and summer leading into the NFL season.
How Pick'em Works on Underdog
Underdog also runs a pick'em product similar to PrizePicks: pick 2–5 players to go over or under their stat projections, get a multiplier on your entry if they all hit. The Underdog pick'em product is currently restricted to a smaller list of states than DFS Drafts due to ongoing regulatory questions in 2024–2025. If pick'em isn't available in your state, you'll see Drafts as the main option.
The Bonus, Honestly
Underdog's standard signup offer is a 100% deposit match up to $100. Some periods feature stacked offers like "Play $5, Get $50 in Bonus Entries" — these are usually better for low-deposit players because they convert immediately into contest entry fees.
Bonus mechanics:
- Bonus funds are credited as "Underdog Bucks" that can be used to enter contests but not withdrawn.
- Any winnings from contests entered with Underdog Bucks are immediately withdrawable as cash.
- Promotional terms vary — always read the offer's fine print for playthrough requirements and expiration.
Sports Coverage
Underdog skews toward the major North American sports:
- NFL — the platform's identity. Best Ball Mania is the marquee.
- NBA — both drafts and pick'em (in eligible states)
- MLB — drafts and pick'em throughout the season
- NHL — pick'em primarily
- MMA — pick'em
- College football and college basketball — drafts during their seasons
Notably absent vs. DraftKings: PGA golf, NASCAR, soccer, eSports, tennis. Underdog is the right home if you love the major team sports; if you have edge in golf or motorsports, DraftKings is still your platform.
The App and Overall UX
Underdog's mobile app is one of the best-designed in DFS. It feels less crowded than DraftKings and more focused than FanDuel — there are essentially three things to do (Drafts, Pick'em, Champions), and the app makes each easy to find.
Highlights:
- Draft interface. The live drafting experience is the best in the industry — fast, clean, with player ADP and recent picks always visible.
- Live tracking during NFL games. Watching a best-ball roster auto-optimize in real time on Sunday is genuinely exciting.
- Onboarding. First-time draft tutorial walks you through how scoring and pick rounds work without being condescending.
Trade-off: because the app is built around drafts and pick'em, it doesn't do salary-cap DFS. If you want both, you'll have a separate DraftKings or FanDuel app on your phone.
Deposits, Withdrawals, and Fees
Deposits are instant via credit/debit card, PayPal, Venmo, and Trustly bank link. Minimum deposit is $5.
Withdrawals are processed via PayPal, Venmo, or Trustly, with most processed within 24–72 hours. There are no Underdog-side fees on withdrawals. The first withdrawal requires identity verification (a quick one-time process).
Where Underdog Is Legal
Underdog Drafts (best-ball, snake drafts, Champions) are legal in 40+ U.S. states plus Washington, D.C. Underdog Pick'em is legal in fewer states due to ongoing regulatory questions. Some states allow Drafts but not Pick'em (Pennsylvania, for example).
Age requirements vary: most states are 18+, but Alabama and Nebraska are 19+, and Arizona, Massachusetts, and Virginia are 21+. Check the current state availability before depositing if you live in a regulatory edge case — we maintain an updated list in our legal states guide covering both Underdog and PrizePicks.
Pros and Cons
How Underdog Compares
| Feature | Underdog | PrizePicks | DraftKings |
|---|---|---|---|
| Signup Bonus | 100% match up to $100 | 100% match up to $100 | 20% match up to $1,000 (DK Dollars) |
| Format | Drafts, best-ball, pick'em | Pick'em only | Salary cap, Showdown |
| Lineup Management | None (best-ball) | None | Required weekly |
| Marquee Tournament | $15M+ Best Ball Mania | Daily Arena lineups | $1M+ NFL Millionaire Maker |
| States Available | 40+ (Drafts) | 30+ (Arena) | 44+ |
| Best For | Draft lovers, NFL focus | Quick prop entries | Variety, big GPPs |
Who Should Sign Up for Underdog
Sign up if: you've played season-long fantasy and loved the draft but hated the weekly lineup grind. Or if you want a shot at the largest fantasy football tournament in the industry. Or if you want both drafts and pick'em on a single, well-designed platform.
Skip it if: you only care about salary-cap DFS or a sport Underdog doesn't cover (golf, NASCAR, soccer). DraftKings or FanDuel are better fits.
Frequently Asked Questions
Is Underdog Fantasy legit?
Yes. Underdog has paid out hundreds of millions in winnings since 2020 and is licensed in every state where it operates. The company is privately held but has raised significant funding and is one of the fastest-growing DFS operators.
What's the difference between best-ball and snake drafts?
Both use a snake-style draft. The difference is what happens after: in best-ball, the platform auto-starts your highest scorers each week — you do nothing. In a "regular" snake draft (less common on Underdog), you may set lineups weekly. For Best Ball Mania and most Underdog tournaments, it's best-ball.
How fast does Underdog pay out winnings?
Withdrawals via PayPal, Venmo, or Trustly typically arrive within 24–72 hours. There are no fees from Underdog on any withdrawal method.
Is the Underdog pick'em product the same as PrizePicks?
Mechanically, it's similar — pick 2–5 players to go over or under their stat lines. Underdog tends to offer slightly different multiplier structures and has fewer sports in its pick'em product than PrizePicks. State availability also differs.
Can I play Underdog if I'm in a state where pick'em isn't legal?
Often yes — Drafts are legal in more states than Pick'em. Pennsylvania, for example, allows Underdog Drafts but not Pick'em. Check Underdog's site for your specific state.
Is the signup bonus really worth it?
Yes, especially if you're entering Best Ball Mania satellites. A $100 deposit becomes $200 in playable funds. That's enough for 8 satellite entries at $25 each, dramatically improving your odds of qualifying for the main event.