Best MLB Betting Promos & Sportsbook Bonuses (2026 Guide)

MLB betting promos change frequently by sportsbook and state, so this guide focuses on what new customers may see during the 2026 season and what to check before claiming an offer (eligibility, bonus-bet rules, expiry windows, and state availability). Below you’ll find the top welcome promos tied to MLB betting, plus quick notes on how each bonus works and what terms impact real value.

Verification note (2026 season): Offer amounts, eligibility, and legal-state availability were reviewed using sportsbook promotional terms and in-app offer screens where available. Because promos can change by state and time, readers should confirm the exact offer inside the sportsbook app before depositing or placing a qualifying bet.

How We Ranked These MLB Welcome Promos

We compared MLB welcome offers using a weighted rubric:

• 40% – Real value of the reward (bonus bet amount, whether win is required, typical conversion value)
• 25% – Terms & restrictions (expiry windows, bet type restrictions, min odds, exclusions)
• 20% – Ease of claiming (code required vs auto-applied, deposit requirements, clarity in-app)
• 15% – State availability (how widely available the promo is)

Example: A “win-required” Bet & Get may rank lower than a “win-or-lose” offer even if the headline number is higher, because the expected value is less consistent for most bettors.

Best MLB Betting Promos & Baseball Bonuses

Most MLB betting sites offer special welcome bonuses to attract new users during baseball season. Unfortunately, not all offers are created equal. Some provide more value than others, and some are not even worth the time you’d spend signing up.

To help you out, our team at ATS.io has done the legwork and provided a list of the best (and most valuable) MLB sportsbook promotions and bonus codes for the 2026 season. Check them out!

Important: Sportsbook availability and promo terms vary by state and can change during the season. You must be physically located in an approved state to wager, and you should confirm the current offer in-app before signing up.

Reviewing the Top 5 MLB Sportsbook Promo Codes

As we mentioned in the previous section, the top 5 MLB betting bonuses come from the following sportsbooks:

1. FanDuel
2. Bet365
3. BetMGM
4. DraftKings
5. Caesars

Let’s take a closer look at each platform’s welcome offer and see what makes them so valuable to baseball fans across the country.

FanDuel

• ⚾ MLB Sign Up Bonus: Get $350 in Bonus Bets Guaranteed – When You Bet $5 for 7 Days
• 🎁 MLB Promo Code: Click To Claim
• 🌍 Legal States: AZ, CO, CT, IL, IN, IA, KS, KY, LA, MA, MD, MI, MO, NC, NJ, NY, OH, PA, TN, VA, VT, WV, WY

FanDuel Sportsbook is now offering a special “Bet & Get” promotion to baseball bettors this season. Here’s how it works:

Sign up today at FanDuel and place a qualifying wager on any MLB betting market (moneylines, run lines, totals, player props, etc.). Then you’ll receive bonus bets according to the terms of the promotion. It’s really that simple! No FanDuel Sportsbook promo code is needed.

Bet365

• ⚾ MLB Sign Up Bonus: Bet $10, Get $200 in Bonus Bets Win or Lose

  Gambling Problem? Call 1-800-GAMBLER. Deposit required. Paid in Bonus Bets. Bonus Bets wager excluded from returns. New Customers only. T&Cs, time limits and exclusions apply.

• 🎁 MLB Promo Code: Click to Claim
• 🌍 Legal States: AZ, CO, IA, IL, IN, KS, KY, LA, MD, MI, MO, NC, NJ, OH, PA, TN, VA

bet365 is offering another great “Bet & Get” offer for MLB fans across the U.S. If you sign now using our exclusive bet365 Sportsbook promo code ATSBONUS1500 and place a qualifying wager on any baseball game (or another betting market of your choice), you’ll get your bonus bets.

BetMGM

• ⚾ MLB Sign Up Bonus: Up To $1500 in Bonus Bets Back if your First Bet Does Not Win
• 🎁 MLB Promo Code: ATSBONUS1500
• 🌍 Legal States: AZ, CO, DC, IL, IN, IA, KS, KY, LA, MD, MA, MI, NJ, NY, NC, OH, PA, TN, VA, WV, WY
  

Next up, we have BetMGM Sportsbook and its exciting offer for baseball fans! Here’s how it works:

Sign up today using our exclusive BetMGM promo code ATSBONUS1500 to unlock one of the site’s current deals.

DraftKings

• ⚾ MLB Sign Up Bonus: Bet $5, Get $100 In Bonus Bets Instantly
• 🎁 MLB Promo: Click To Claim
• 🌍 Legal States: AZ, CO, CT, DC, IN, IA, IL, KS, KY, LA (select parishes), MA, MD, ME, MI, MO, NC, NJ, NY, OH, PA, TN, VA, VT, WV or WY

If you haven’t found the perfect MLB betting promotion just yet, perhaps the DraftKings Sportsbook bonus is exactly what you’re looking for.

DraftKings’ MLB welcome promo typically requires a $5+ wager on an eligible market. After your bet settles, qualifying new users receive bonus bets credited to their account. Always confirm the current offer inside the DraftKings app before placing the qualifying bet.

Caesars

• ⚾ MLB Sign Up Bonus: Bet $1, Double Your Winnings 10x
• 🎁 MLB Promo Code: CLICK TO CLAIM
• 🌍 Legal States: AZ, CO, DC, IA, IL, IN, KS, KY, LA, MA, MD, ME, MI, MO, NC, NJ, NV, NY, OH, PA, TN, VA, WY, WV

Last but not least, Caesars has a special deal for MLB betting during this season. And it’s a bit different from the other offers we’ve talked about in this guide. Let’s break it down:

The Caesars Sportsbook bonus is a new-user welcome offer that lets eligible bettors earn their bonus after opening a new account with a qualifying promo code and placing their first real-money wager. Just click on the Claim Bonus button above to get started.

How We Rank the Best MLB Betting Promos

Not all MLB sportsbook promos are created equal. Some give you real value, while others come with strings attached that make them pretty difficult to turn into real money.

That’s why our team at ATS.io considers many different factors before recommending any particular offers to our readers. Here are a few things we look at:

• 💰 Bonus Amount: Of course, we would always like the bonus to big. I mean…would you rather have $5 or $100?
• 📜 Fair Terms & Conditions: Have you ever claimed a sign-up bonus only to realize the terms and conditions make it a lot less valuable? Yeah, we hate that too. Our team of experts always checks for reasonable wagering requirements, expiration dates, and any other hidden restrictions/limitations that you should be aware of.
• ⚡ Ease of Use: The best MLB betting promos should be easy to claim and use. You shouldn’t have to jump through too many hoops just to unlock your rewards.
• 🌎 Availability & Eligibility: Some baseball betting promotions are only available in a handful of states. As a result, we make sure to clarify where each offer is currently available and who qualifies for it.
• 🔁 Ongoing vs. One-Time Offers: Some sportsbooks have great sign-up bonuses, but very few (or no) ongoing promotions for existing users. We prefer MLB betting sites that continue rewarding players with daily odds boosts, loyalty rewards, no-sweat bets, and other valuable offers.

By considering these factors, we always make sure you’re only getting the best MLB betting promos out there. No fluff, no gimmicks! Just real value to boost your bankroll this baseball season.

Common Types of MLB Sportsbook Bonuses

New to sports betting? Or at least the bonus part of it? Don’t worry! We’ve got you covered. Here are a few of the most common types of MLB betting promotions that you’re likely to encounter:

Bet & Get

These are one of the most popular sign-up bonuses at baseball betting sites and apps. Here’s how it works: you place a small qualifying wager (usually just ~$5 or so), and the sportsbook gives you a certain amount of bonus bets—typically much more than the amount you bet in the first place.

Odds Boosts

Odds boosts, on the other hand, increase your potential payout on a certain type of bet, giving you a chance for a bigger reward with no extra risk involved. For example, a sportsbook may boost a player’s home run odds from +200 to +300, meaning you’d win more money for the exact same bet.

First Bet Offers

Also known as “no-sweat bets,” first bet offer promotions provide a safety net in case your wager isn’t successful. They’ll typically provide a 100% refund in site credit (aka bonus bets) if you lose.

For example, DraftKings commonly offers a no-sweat same game parlay promotion during the MLB season. You build a SGP with 3+ legs included and minimum odds of +400 or longer. If it wins, enjoy your boosted payout. If it loses, you get the full amount back in bonus funds.

Refer A Friend

Finally, most MLB sportsbooks offer a referral bonus when you invite friends to sign up. Your friend just needs to sign up using your account’s unique referral link (or code) and make their first deposit. Then, you’ll both typically get a bonus bet. FanDuel does this, and their referral bonuses are usually $50 each.

How To Use an MLB Betting Promo Code

Using a promo code to claim your sign-up bonus during baseball season is quick and easy. Here are the steps you’ll normally need to take:

1. ⚾ Choose a Sportsbook: First, pick an MLB sportsbook that operates legally in your home state and provides a generous welcome offer to all new users. You can check out our list at the top of the page to find some of the best options available right now.
2. 📝 Sign Up for an Account: Click the sign-up button on the betting site (or app). Then, enter some of your personal details (name, email, date of birth, etc.) as requested. Make sure to use accurate information; this way, they can verify your account right away.
3. 🎟️ Enter the Promo Code (If Required): Some sportsbooks will require you to enter a special promo code or bonus code during the sign-up process or when making your first deposit. When necessary, you can copy and paste the codes that we’ve provided in the table further up the page.
4. 💰 Make a Qualifying Deposit: Most MLB betting promos will require a minimum deposit to activate. For example, if the offer is “Bet $5, Get $200,” you’ll need to deposit at least $5 or more.
5. 📊 Place Your First Bet: Follow any of other terms associated with your MLB betting bonus. Using the same example of a “Bet $5 Get $200” promotion, you would need to wager $5+ on an eligible market to unlock your rewards.
6. 🎉 Claim Your Bonus: Now, you’re good to go! After meeting these requirements, you’ll receive your bonus bets (or other rewards like odds boosts, depending on the offer). Just remember that most promotions come with an expiration date, so make sure to use it before you lose it.

States With Legal MLB Sportsbook Bonus Offers

To claim an MLB betting bonus, you must be physically located in a state where online sports betting is legal. As it currently stands, there are 31 U.S. states that meet this requirement (as well as Washington, D.C.). They include:

• Arizona
• Arkansas
• Colorado
• Connecticut
• Delaware
• Florida
• Illinois
• Indiana
• Iowa
• Kansas
• Kentucky
• Louisiana (55 of 64 parishes)
• Maine
• Maryland
• Massachusetts
• Michigan
• Mississippi
• Missouri
• Nevada
• New Hampshire
• New Jersey
• New York
• North Carolina
• Ohio
• Oregon
• Pennsylvania
• Tennessee
• Vermont
• Virginia
• Washington, D.C.
• West Virginia
• Wyoming

If you live in a state that is not listed above, I’d encourage you to take advantage of the latest Fliff Promo Code.

Fliff is a social sportsbook that operates legally in nearly all U.S. states, offers prediction markets on the MLB and many other popular sports leagues, and gives you a chance to win real cash prizes through sweepstakes-style promotions.

Oh, and they’re currently offering a 100% match on your first purchase. So, don’t miss out!

Why Do Sportsbooks Offer Baseball Betting Promos?

Sportsbooks run MLB promos to acquire new users and keep bettors engaged across a long season. Welcome offers drive first deposits, while odds boosts and other boosted bets encourage repeat wagering during high-volume slates.

Why would a sportsbook just give more money to wager (like with bonus bets) or increase the potential payout (like with odds boosts). Online sportsbooks offer MLB betting promos for one simple reason: competition. There are lots of different betting sites out there, and they are all fighting for your attention.

A huge sign-up bonus is a good way to get you in the door initially, and daily odds boosts (for example) will usually keep you coming back to bet throughout the season.

It also has to do with engagement. The baseball season is long (162 games, to be exact), and games are being played almost every day. As a result, betting sites will use promotions to keep bettors active.

Ultimately, sportsbooks aren’t just handing out money for free. They know that once you start betting, you’ll likely stick around and place more wagers. But if you play it smart and take advantage of the offers that actually provide real value, these MLB betting promos can give you an edge over the long run.

Swing for the Fences: Claim the Best MLB Betting Bonuses!

MLB welcome promos can add value, but the best offer depends on your state, the bonus-bet rules, and how quickly you plan to use the credits. Before signing up, confirm the offer inside the app (amount, eligibility, expiry, and payout rules for bonus bets).

Written by

Jay Sanin

Jay Sanin is the GM and Head of Sports at ATS.io. He has been writing about sports gambling since 2013, handicapping tens of thousands of sporting events. He plays sides and totals aggressively across most sports and is more selective in player prop markets. He does his own modeling across most sports, and his family is jealous of how much time he spends on his precious spreadsheets.

MLB Betting Promos FAQs – Your Questions Answered