Promo Code
100% Match Bonus up to $100
Underdog offers many DFS game types, including Best Ball. T&Cs Apply, 18+.
Verified 01/23/2022
RG Rating: 4.0
Expires: 01/31/2022

Underdog Fantasy Promo Code

Eight years ago, daily fantasy sports sites were popping up left and right. Things have shifted since then, with FanDuel and DraftKings cementing themselves as industry hegemons. While our options have largely consolidated, this year all fantasy sports lovers, whether it be DFS or season-long, NFL or NBA, should beware of the Underdog.

Underdog Fantasy, that is.

Spearheaded by founder Jeremy Levine, a veteran in the DFS industry who previously founded the sites StarStreet and Draft, Underdog Fantasy is Levine’s most ambitious fantasy sports project yet, and people have taken notice. After a successful rollout ahead of the 2020 NFL season, a plethora of big-name investors, including Mark Cuban, Kevin Durant, Adam Schefter, The Chainsmokers, Nas, Future and more wanted to place their bets on the Underdog in 2021.

With a team like that, you know the product is going to be awesome. Let’s take a closer look at what Underdog Fantasy has to offer when it comes to fantasy sports formats and games, and what differentiates it from other sites.

Underdog Fantasy Bonus Offer

Use Underdog Fantasy promo code GRINDERS to secure a 100% deposit match bonus that’s worth up to $100.

Underdog Fantasy Promo Code


Deposit Bonus100% Match up to $100
Bonus ReleaseInstant
Offer AvailabilityOffer Starts: December 1, 2021 | Ends: December 31, 2021
T & CsOffer for new players only. Must be 18 years of age, and live in eligible state.

Underdog Fantasy Contest Types

Underdog Fantasy offers four games for the four major sports (NFL, NBA, MLB and NHL). Snake drafts are for season-long, daily, and weekly contests. If you want action on today’s games, you can join 2-6 man contests and start drafting now. Or you can ditch the draft and go straight to Underdog’s Pick’em offerings (Over/Under & Rivals), allowing you to win as much as 20x your entry— the more you pick, the more you win!

Best Ball, however, is Underdog’s favorite treat.

What is Best Ball?

Best Ball is fantasy in its simplest form. An innovative but less demanding season-long fantasy game, Best Ball’s draft-only format allows users to compete without having to make week-to-week adjustments. In Best Ball leagues the waiver wire, trades, and lineup management are pushed aside, but the most exciting part of fantasy sports is here to stay: the draft.

Through Best Ball, users can get a massive amount of skin in the game and enjoy the thrill of drafting until their heart’s content, while ridding themselves of regret that they might have overcommitted.

Too many leagues? In Best Ball, there’s no such thing.

Underdog Fantasy has large Best Ball prize pools for the upcoming NBA Playoffs and a unique Rookie + Sophomores format for the 2021 NFL season.

Speaking of football, Underdog Fantasy is ready to make someone a millionaire. Are you ready to bite?

Best Ball Mania II – $3.5M In Prizes!

Just how popular is Best Ball? Popular enough to hand out a $1,000,001 paycheck. That’s right, Underdog Fantasy has a GUARANTEED $3.5M fantasy football tournament this season, with a $1M prize to whoever drafts the best Best Ball team. Remarkably, Best Ball Mania II only costs $25 to enter! It’s the biggest Best Ball tournament of the year and you don’t want to miss out. Sign up now, deposit, and draft up to 150 teams… plus your first is on us.

Best Ball Format

In Best Ball Mania II and other Best Ball NFL tournaments at Underdog Fantasy, each participant drafts a total of 18 players per entry through a snake draft. For the purposes of Best Ball Mania II, you will be in a draft with 11 other people whom you will compete with throughout NFL Weeks 1-14, followed by three subsequent rounds en route to the $1M prize. Underdog has smaller league sizes, too, consisting of 3 and 6 teams.

Roster Requirements

QB – 1
RB – 2
WR – 3
TE – 1
BENCH – 10

Each week, your starting lineup will consist of the top scorers from your roster at the designated positions seen above. For example, if you have seven receivers, the top three scoring receivers in a given week will automatically be listed as your starters.

Fantasy Scoring

Underdog’s fantasy scoring isn’t much different than what you see elsewhere. For their fantasy football leagues, Underdog Fantasy has adopted 0.5 PPR (points per reception) scoring.

Best Ball Mania II – Tournament Structure

You’re probably wondering how a $3.5M Best Ball tournament consisting of 155,520 entries works. Underdog divides these entries into 12,960 12-person groups. As mentioned earlier, you can draft up to 150 teams, but none of your teams will be in the same group. All teams compete within their group of 12 in Round 1, which begins with NFL Week 1 and concludes with the final game of NFL Week 14.

From there, the top two performing teams from each group advance to Round 2, locking in a minimum $30 cash prize. Then, they’ll join one of 1,440 18-person groups.

Round 2 starts and finishes with NFL Week 15, where, again, the top two performing teams from each group move on to form 160 18-person groups for NFL Week 16.

In Round 3, only the top-scoring team from each group advances, leaving 160 entries to battle for the top $1M prize in NFL Week 17.

In sum, this is how it looks:

  • Round 1 (Weeks 1-14): 12-person groups, top-2 advance (155,520 entries)
  • Round 2 (Week 15): 18-person groups, top 2 advance (25,920 entries, min $30 prize)
  • Round 3 (Week 16): 18-person groups (2,880 entries, min $125 prize)
  • Round 4 (Week 17): Final 160 entries, the top-scoring team wins $1M (min $1K prize)

Best Ball During the NFL Playoffs

The Best Ball fun doesn’t end with the regular season. Underdog is running some massive Best Ball contests for 2021 NFL Playoffs, too! The Gauntlet guarantees $1M in prizes, including a solid payout structure that pays $200K to 1st place, $100K to 2nd, and $50K to 3rd. The marquee postseason Best Ball tournament costs only $25 per entry and the tournament is capped at 45.1K entrants, paying out $50 to 2821-7520th places. Best Ball in the playoffs is especially interesting since some players will play fewer games than others. This format invites different strategy than regular-season Best Ball — picking players who eventually make it to the “Big Game” is massive, but that doesn’t necessarily make it optimal to pick from the top teams. A lot of people drafting are likely to gravitate towards teams that are favored to win their conference championships, but considering the recent parity in the league, it may make more sense from a game theory perspective to pick players from teams that are longshots to win the Super Bowl. Doing so will give you leverage with lower ownership in large tournaments.

How Long Do Drafts Take?

Users can select between two different draft speeds, depending on their needs and the type of draft experience they desire.

Fast Drafts

Short for time? Find a league/tournament with a Fast Draft. In these, each user is given 30 seconds per pick.

Slow Drafts

Behind on research or simply want to take your time to strategize? Then find a Slow Draft, which allows 8 hours per pick. This means you won’t have to stay on your laptop or phone throughout the duration of the draft. You can build your player queue in case you have technical issues or oversleep, but otherwise, you can return to the draft room whenever it’s your turn and you’re ready to make your decision.

Note: Underdog Fantasy shortens Slow Drafts as the season nears. 22 days before Week 1, the Slow Draft clock changes to 4 hours per pick. Seven days before Week 1, the clock shortens to 1 hour per pick.

Best Ball Tips

While RotoGrinders will have more in-depth Best Ball content from our NFL experts as we inch closer to the NFL season, here are a couple of general Best Ball tips to keep in mind when drafting your teams.

Raise the Roof – In Best Ball, and especially large-field tournaments like Best Ball Mania II, you want to target players with high ceilings. Unlike traditional season-long leagues, you aren’t competing head-to-head against a single opponent every week. You’re competing against your entire group — in many cases against 11 other teams! — and you’re trying to score more than all of them. As a result, a player’s ceiling is that much more valuable, and you should treat it as such.

Stacking – Just like in NFL DFS tournaments, it makes sense to stack players from the same team. For example, try to pair your quarterbacks with pass-catchers. If their tight end or wide receiver has a huge game, chances are the quarterback will too! Of course, unlike in traditional NFL DFS formats, there’s an added element of scarcity in Best Ball drafts. Once a player is selected by an owner from your group, that player can’t be selected again. More often than not, a player on your draft board will be taken before it’s your turn. Be careful to not give up too much value by reaching for players in an effort to stack. Also, in Best Ball, it’s ok to stack from the same teams even when the players aren’t necessarily correlated. Remember, this is a season-long format — you don’t have to nail your stacks every week. One week, it may be the quarterback’s time to shine, the next week could be the running back’s.

Read more: NFL Best Ball – Does Stacking Work?

Where Can I Play Underdog Fantasy?

Underdog Fantasy is available in all of Canada and in most states in the U.S. In fact, you can currently play Underdog Fantasy in 40 states. Unfortunately, Underdog isn’t barking in AZ, DE, HI, ID, IA, LA, MT, NV, PA or WA — yet. But with pending applications in various states, Underdog Fantasy may enter your yard soon (if it’s not already there)!

Underdog Fantasy Banking

Deposit easily using PayPal or your preferred credit card.

Does Underdog Fantasy Have an App

You can play online or use one of Undergog Fantasy’s mobile apps, which are available for iOS and Android. is the home of the daily fantasy sports community. Our content, rankings, member blogs, promotions and forum discussion all cater to the players that like to create a new fantasy team every day of the week.

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