9.3/10

Underdog Promo Code: ACTION for Play $5, Get $50 in Bonus Entries!

Underdog Offers & Mobile App Review May 2026

🚨 Underdog Promo Code Offer 🚨

Use the Underdog promo code ACTION for this offer: Play $5, Get $50 in Bonus Entries! This welcome bonus is available to players in all states where Underdog is live.

With the NBA and NHL Playoffs shifting into crucial Game 3 and Game 4 weekend matchups, and a massive UFC 328 card headlined by Chimaev vs. Strickland, now is the perfect time to build out your Pick'em slips. Known for its Best Ball Tournaments, Underdog is one of the most popular sites for playing daily fantasy sports. 

Read on to learn more about the Underdog promo code, welcome offer, and unique features!

Best Underdog Promo Code for May 09, 2026

⭐️ Underdog Promo Code ACTION
💰 Underdog Welcome Offer

Play $5, Get $50 in Bonus Entries!

📍 Underdog Available States AL, AK, AR, CA, DC, FL, GA, IL, IN, KS, ME, MS, MN, NE, NM, NC, ND, OK, OR, RI, SC, SD, TX, VT, VA, UT, WI, WY
📝 Terms and Conditions

*Must be 18+ (19+ in AL, NE; 19+ in CO for some games; 21+ in AZ, MA, and VA) and present in a state where Underdog Fantasy operates. Terms apply. Offer not valid in MD, MI, NJ, NY, OH, and PA. Concerned with your play? Call 1-800-MY-RESET or 1-800-GAMBLER or visit www.ncpgambling.org; AZ: 1-800-NEXT-STEP (1-800-639-8783) or text NEXT-STEP to 53342; NY: Call the 24/7 HOPEline at 1-877-8-HOPENY or Text HOPENY (467369).

✍️​ Promo Verified By
Steve Petrella
✅ Promo Last Verified On May 09, 2026

TL; DR

  • Game Variety: Dive into daily fantasy sports with options like Best Ball tournaments, Pick'em contests, and daily drafts for major leagues (NFL, NBA, etc.).

  • App Features: Enjoy a user-friendly app that makes it easy to track picks, join streak challenges, and save favorite players for quick access.

  • Pros & Cons: Players love the smooth gameplay and innovative features, though some report slow withdrawals and occasional customer service delays.

  • The Verdict: Overall, it’s a top-rated platform that caters to both casual and competitive fantasy sports fans! 🏈🏀⚾

What Is the Underdog Promo Code?

Underdog Fantasy logo on a yellow background with black “UNDERDOG” text and “Promo Code: ACTION” displayed below.

The current Underdog promo code is ACTION, an exclusive sign-up bonus that grants new players $50 in Bonus Entries after they make an initial $5 play.

💎 Qualifying wager $5
💰 Minimum Deposit $10
🎁 Bonus Entries $50
⏰ Expiration Window 14 days
👾 Play-Through Requirement  You must meet a 1x playthrough requirement on your entire deposit + bonus amount before any funds can be withdrawn.
 ​💸​ Money Back Guarantee  Underdog offers up to a $100 refund on your first contest if you are dissatisfied. To claim this, you must contact support within 48 hours of entering the contest and agree to permanently close your account.

Ready to claim your next DFS promo? Check out the Bleacher Nation DFS promo code.

How to Sign Up with the Underdog Promo Code

  1. Click one of our sign-up links on this page.
  2. Enter a username with only numbers and letters.
  3. Insert your email and create a password of at least eight characters and include at least one number and one special character.
  4. Enter your Date of Birth.
  5. Punch in the Underdog promo code ACTION
  6.  Agree to the Underdog Terms of Use and Private Policy (Users must confirm they are at least 18 years old or 19+ in Alabama/Nebraska, and 21+ in Massachusetts/Arizona).
  7. Start betting!

Underdog Promo Code vs. Competitors

While Underdog is a top-tier DFS platform, it is always smart to shop around to ensure you are getting the best value for your deposit. Here is how Underdog's promo code stacks up against other major players in the daily fantasy space:

DFS Platform Welcome Offer Bonus Type Why it's different Bonus Expiry
Underdog Play $5, Get $50 in Bonus Entries! Bonus Bets Excellent Best Ball tournaments and a highly intuitive app interface. 14 Days
DraftKings Pick6
Play $5, Get $50 Instantly in Bonus Picks! Bonus Picks 
You get your bonus picks instantly after your first $5 entry, backed by the DraftKings brand.
14 Days
Sleeper Get Free $20+100% Deposit Match up to $100! Deposit Match
Deeply integrated social features that let you chat and share picks directly with your squad.
30 Days
Dabble Get $10 When You Sign-Up to Dabble! No Deposit Bonus
It is the only major DFS app that gives you bonus credit without requiring any initial deposit.
14 Days

Use Underdog Promo Code ACTION on This Weekend's Games

Get in on the DFS action this week by using the Underdog promo code ACTION to claim your Play $5, Get $50 in Bonus Entries welcome offer. 

League Game / Event Date & Time (ET) Network
🏀 NBA Playoffs Cavs vs. Pistons (Game 2) May 7, 7:00 p.m. Prime Video
MLB Rays vs. Red Sox May 7, 7:00 p.m. ESPN
🏒 NHL Playoffs Hurricanes vs. Flyers (Game 3) May 7, 8:00 p.m. TNT
🏀 NBA Playoffs Lakers vs. Thunder (Game 2) May 7, 9:30 p.m. Prime Video
MLB Cardinals vs. Padres May 7, 10:00 p.m. ESPN
🏒 NHL Playoffs Canadiens vs. Sabres (Game 2) May 8, 7:00 p.m. TNT
🏀 NBA Playoffs Knicks vs. 76ers (Game 3) May 8, 7:00 p.m. Prime Video
MLB Twins vs. Guardians May 8, 7:15 p.m. Apple TV+
🏀 NBA Playoffs Spurs vs. Timberwolves (Game 3) May 8, 9:30 p.m. Prime Video
🏒 NHL Playoffs Golden Knights vs. Ducks (Game 3) May 8, 9:30 p.m. TNT
MLB Cardinals vs. Padres May 8, 9:45 p.m. Apple TV+
🏀 NBA Playoffs Pistons vs. Cavs (Game 3) May 9, 3:00 p.m. NBC
MLB Astros vs. Reds May 9, 4:10 p.m. FS1
🥊 UFC 328 Chimaev vs. Strickland (Main Card) May 9, 9:00 p.m. Paramount+
🏒 NHL Playoffs Hurricanes vs. Flyers (Game 4) May 9, 6:00 p.m. TNT
MLB Mets vs. Diamondbacks May 9, 7:15 p.m. FOX
MLB Cardinals vs. Padres May 9, 7:15 p.m. FOX
🏀 NBA Playoffs Thunder vs. Lakers (Game 3) May 9, 8:30 p.m. ABC
🏒 NHL Playoffs Wild vs. Avalanche (Game 3) May 9, 9:00 p.m. TNT
MLB Nationals vs. Marlins May 10, 12:10 p.m. Peacock
🏀 NBA Playoffs Knicks vs. 76ers (Game 4) May 10, 3:30 p.m. ABC
🏒 NHL Playoffs Sabres vs. Canadiens (Game 3) May 10, 7:00 p.m. ESPN
MLB Tigers vs. Royals May 10, 7:20 p.m. Peacock
🏀 NBA Playoffs Spurs vs. Timberwolves (Game 4) May 10, 7:30 p.m. NBC
🏒 NHL Playoffs Golden Knights vs. Ducks (Game 4) May 10, 9:30 p.m. ESPN

Is the Underdog Promo Code Legit?

Yes, the Underdog promo code ACTION is 100% legit. We never recommend a promo code or DFS platform to our readers without verifying it firsthand to ensure it works exactly as advertised.

To test the promotion, I personally downloaded the Underdog app, created a new account, and applied the ACTION code during the registration process. After completing the sign-up steps and making our initial $5 play, the $50 in Bonus Entries hit our accounts exactly as promised.

The entire process was easy, the bonuses were credited without us having to chase down customer service, and we were immediately able to use those bonus entries to build lineups for that night's slate of games. There are no hidden hurdles—what you see is exactly what you get!

Currently, the Underdog promo welcome offer is active in these U.S. states: AL, AK, AR, CA, DC, FL, GA, IL, IN, KS, ME, MS, MN, NE, NM, NC, ND, OK, OR, RI, SC, SD, TX, VT, VA, UT, WI, WY.

Read Next: Underdog's Prediction Markets

Daily Underdog Promotions for May 09, 2026

Underdog lists promotions on their website for existing users to use to their best advantage. Here are some of the promos users can use to play with friends, boost their own picks, or even get a money back guarantee. 

  • Streaks: Choose at least two players from different teams and try to build a winning streak. If you record 11 wins in a row, you can win up to 5000x your entry!

  • Featured Drafts: Log into the app daily to find specialized, featured drafts across major leagues like the WNBA, MLB, PGA, and NFL.

  • Favorite Players: Keep track of your top performers. Tap the ❤️ next to any player's name to save them to your 'Favorites' for quick access when building your slips.

  • Refer-a-Friend: Get a $10 site credit for every friend you refer! Your friend just needs to sign up using your username as a referral code, deposit at least $10, and play through that deposit. (Note: You must use the $10 referral credit in a contest before it can be withdrawn).

  • Multiplier Boosts & Specials: Underdog frequently offers boosted payouts and discounted player projections (Specials). Keep in mind that any extra winnings generated specifically from the boost or special are awarded as bonus funds, which carry a standard 1x play-through requirement before they can be cashed out.

How to Play on Underdog

Once you have created your account and claimed your welcome bonus using the Underdog promo code ACTION, here is how you actually play:

1

Choose Your Game Mode

Use the bottom navigation bar in the app to select either "Drafts" (for Best Ball, Battle Royale, and daily snake drafts) or "Pick'em" (for Higher/Lower player projections).

2

Make Your Selections

If you enter a Draft, you will take turns picking players for your roster against other users. If you are playing Pick'em, you must choose at least two players from different teams and decide if they will go Higher or Lower than their listed stat projection. 

3

Set Your Entry Amount

Decide how much of your withdrawable cash or bonus entries you want to put on the line for that specific contest.

4

Submit and Track

Lock in your entry! You can follow along in the "Live" tab of the app to watch your players rack up stats and see your potential payouts update in real-time.

Underdog Mobile App & Website Experience

Action Network has examined user reviews on the Apple App Store and the Google Play Store to identify exactly what players love—and what frustrates them—about the Underdog mobile app. 

Current App Ratings:

  • Apple App Store: 4.8/5 Stars — 129.4k+ Ratings (May 2026)

  • Google Play Store: 4.7/5 Stars — 9.9k+ Reviews (May 2026)

👍 What Users Love (Pros) 👎 Common Frustrations (Cons)
Sleek, Beginner-Friendly UI: Both iOS and Android users rave about the clean, intuitive design that makes drafting teams and building Pick'em slips a breeze. Customer Service Delays: The most common complaint across both platforms is slow or unresponsive support when dealing with account issues or uncredited promos.
Top-Tier Game Variety: Players are hooked on the massive selection of daily drafts, wide sports coverage, and industry-leading Best Ball tournaments. Withdrawal Speeds: Several users have reported longer-than-expected wait times when trying to cash out their winnings.
Daily Deals & Promos: Users frequently praise the constant stream of discounts, multipliers, and special offers built directly into the home screen. App Glitches & Crashes: Android users specifically noted occasional app crashes, search function bugs, and tech errors when players are ruled out of lineups.
Wide Availability: Players appreciate being able to access Underdog in states where other popular DFS platforms or sportsbooks are restricted. Notification Spam: Android users noted frustration with the "all or nothing" push notification settings, feeling spammed by alerts.

If you'd prefer a lesser-known DFS platform, check out the Chalkboard promo code.

What Are Users Saying About Underdog? 

To get a fair spread of thoughts on the app, we asked beginner and expert fantasy players their thoughts. Newbie Joe Beguiristain had this to say: 

You may or may not have heard of Underdog, but seeing as you are reading this, you must know by now. Seriously, Underdog has become a major player in the DFS space, with strong brand awareness and a cool logo. (I like dogs.)

Getting to things that you actually care about, the Underdog app may not jump out immediately, but it functions very well. The home screen welcomes you with promotions, trending picks, popular picks, and the key matchup of the day. In other words, it’s what a home screen should be.

Of course, you can also search for particular players, teams, or stat types to make picks on. And if Pick’em isn’t your thing, you can head over to Drafts and get in on some old-school DFS action.

Stephen Pierce, a seasoned fantasy player, had this to say:

Making picks for NBA or NFL games on DFS apps has been something fun for me to research and do for years now. Sleeper and PrizePicks are the most popular ones for me and my friends, but we’d heard a lot about Underdog too. Underdog’s reputation is pretty good, so I decided to add it to my DFS rotation this year.

I was really impressed with the Underdog app and DFS experience. Underdog has tons of great stats for all kinds of athletes to make picks on. I tend to focus on big NFL performers in important matchups, but Underdog makes it easy too to also focus on those good performers in all kinds of sports each day. 

Underdog also gave me an onslaught of options for daily drafts to enjoy as well. Me and my friends will do daily drafts in basketball or football games, and we’ve added Underdog to our favorite apps because of how much fun we’ve been having. We can create our own drafts with each other or join big pools too. Underdog has been a great DFS option for all of us who play on these each day!

Who Is Underdog For?

Underdog is built for sports fans who want the thrill of daily fantasy without needing a spreadsheet or hours of free time to micromanage lineups. It is a perfect fit for:

  • The Casual Fan: If you hate the restrictive salary cap constraints of traditional DFS platforms, Underdog’s standard snake drafts completely level the playing field.

  • The Player Prop Enthusiast: The Pick'em format is incredibly intuitive for users who just want to predict "Higher" or "Lower" on their favorite players' daily stat lines.

  • The "Draft and Forget" Player: Underdog's famous Best Ball tournaments let you experience the best part of fantasy sports (the draft) without the weekly grind. There are no waiver wires, trades, or lineup-setting decisions to make—the system automatically optimizes your highest-scoring players each week.

Underdog Deposits and Withdrawals

Underdog has different options for users to deposit and withdraw their money on the site. Obviously, users cannot withdraw bonus credits, but when they've won a minimum of at least $10, then they can begin to withdraw their earnings. 

Method Deposit Withdrawal Minimum Amount Processing Time
PayPal ✅​​ ✅​​ $10 Instant (Deposit) / 48-72 hours (Withdrawal)
Credit / Debit Card (Visa, MasterCard, Amex, Discover) ✅​​ ​​ (Processed as a refund to the original card) $10 Instant (Deposit) / 48-72 hours (Withdrawal)

Important Account Highlights:

  • Balance Types: Account balances are broken down into Bonus (awarded via promotions) and Withdrawable (funds that can be played with or cashed out).

  • Bonus Rules: You cannot withdraw bonus credits directly; they must be played through and converted to winnings first.

According to the site, withdrawals will always be processed as a refund back to the original deposit source whenever possible and any remaining difference will be paid out directly to the user’s requested email via direct PayPal payment.

Betting Options & Sports Market Coverage on Underdog

While Underdog is not a sportsbook like FanDuel or DraftKings, they do have some entertaining and rewarding daily fantasy games for users to try out.  

Underdog Best Ball Tournaments

Users draft players for their roster in a snake draft to compete against other users for prizes at the end of each paid entry period. The players that users draft will gain points based on their performances in their respective sport. The prizes are determined on how much is pooled in each contest by the users.

Pick'Em Contests

Pick 'Em is a game type that's as easy as it sounds: users pick the over/under on certain players' stats for that days games. They must choose from a minimum of two different teams to submit their bet. Players can have fun choosing, for example, NBA players' PTS + RBS + ASTS for the matchup that night that they are looking at.

Daily Drafts

Users can join daily drafts by clicking on the 'drafts' section of the website. Players compete in the sport they choose. Examples would be NHL matchups that night, NFL playoffs, et cetera. The entry and prize amount in Underdog contests varies, but they are usually low stakes. 

Battle Royale

Underdog’s Battle Royale format differs from a standard fantasy contest in a few unique ways. Upon entering, you will get to pick players in a snake draft against six to twelver other users. However, you aren’t just competing against that group; you are competing against every user in every group for a specific time period.

Underdog Customer Service

Underdog has a couple of different ways to contact customer support at the company.

  • 📞 Call — +1 917-267-2182
  • 📧 Email — support@underdogfantasy.com

Responsible Gaming & Spending Controls at Underdog

Playing daily fantasy sports should always be about having fun and sweating the games. Underdog gets that, and they’ve built in some helpful tools right inside the app to make sure you play responsibly and stay within your comfort zone.

  • Deposit & Entry Limits: Set your own caps on how much cash you can deposit or play daily, weekly, or monthly. It’s an easy way to make sure you stick to your budget.

  • Time-Outs: Sometimes we all need a quick breather. You can hit pause on your account for a set amount of time until you're ready to come back.

  • Self-Exclusion: If you decide you need to step away from the app entirely, you can use the self-exclusion list. This locks your account and completely stops all of those promo emails and notifications.

  • State-Mandated Deposit Limits: Keep in mind that certain states enforce their own maximum deposit limits. Currently, Massachusetts is capped at $1,000 per 31 days, Maryland at $5,000 per 31 days, and Tennessee at $2,500 per 31 days.

  • Account Safety: Underdog encourages users to routinely reset their passwords and actively monitor their transaction and payment histories. You can also manually lock your account if you suspect someone else has gained access.

  • Parental Controls: Underdog strictly verifies that all users are of legal age. However, if a minor improperly uses a parent's financial information to create an account, parents are urged to contact support@underdogfantasy.com immediately for account closure and appropriate security measures.

And remember, if you or a friend ever need some help managing your play, Underdog makes it easy to find support by linking directly to resources and hotlines like 1-800-GAMBLER right in the app.

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Steven Petrella

Steve Petrella runs The Action Network’s written content team, which specializes in industry news, betting advice on specific games and slates, betting education and more. He got his start betting about 10 years ago, and got his first job in the sports betting media industry since 2015. Prior to joining Action in 2018, he worked for Sporting News, MLB.com and Cox Media Group.

More from Steve Petrella
Underdog FAQ
What is the Underdog promo code?

Use Underdog promo code ACTION to take advantage of the current welcome bonus: Play $5, Get $50 in Bonus Entries!

Does Underdog have a referral bonus?

Yes, Underdog has a refer-a-friend deal. Once your friend enters your username as the referral code, makes a deposit of at least $10, and uses that $10 to play in a game, you will receive a $10 site credit to your account!

What is the minimum deposit for Underdog?

The Underdog minimum deposit is $10. This can be added to your account via PayPal, debit card, or credit card.

What states currently have Underdog?

As of right now, Underdog is available in: AL, AK, AR, CA, DC, FL, GA, IL, IN, KS, ME, MS, MN, NE, NM, NC, ND, OK, OR, RI, SC, SD, TX, VT, VA, UT, WI, WY

Is Underdog legit?

Yes, Underdog is a licensed and legal sports betting platform for daily fantasy sports. It was started in 2020 by Brandon Stakenborg, Jeremy Levine, and Trevor John. Investors include Kevin Durant and Mark Cuban. As long as you are located in one of the Underdog available states, you can safely participate.

How fast does Underdog pay out?

Payouts will vary depending on the rules of each specific contest. Withdrawals can be done through PayPal or e-check. The minimum withdrawal amount is $10. Fortunately, there are no fees associated with withdrawals.

Does Underdog offer live betting?

No! Underdog is a DFS and Best Ball website and is not a sportsbook.

Can I place a stake on college football with Underdog?

No, Underdog daily fantasy drafts are not available for college football, nor do they offer live scoring. However, pick'ems and higher/lower bets are available for some college football contests.

Is there an Underdog mobile app?

Yes, you can play from your mobile phone on Underdog's free iOS or Android apps.

Picking the Best Sportsbooks Online

Many sports bettors have trouble picking which sportsbook to use. For your reference, Action Network experts developed The Best Sportsbook Quiz. Answer a few short questions about your betting preferences, and our quiz will tell you which of the best sportsbooks are right for you. 

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