Updated August 18, 2026
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.
We compared MLB welcome offers using a weighted rubric:
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.
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 below.
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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.
As we mentioned in the previous section, the top 5 MLB betting bonuses come from the following sportsbooks:
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 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 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 and place a qualifying wager on any baseball game (or another betting market of your choice), you'll get your bonus bets.
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 to unlock the site's current deals detailed below. BetMGM tends to have higher-value offers than the majority of its sportsbook competition, especially for bettors going through the grind of betting the long baseball season.
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.
Last but not least, Fanatics Sportsbook has a special deal for MLB betting during this season. This sportsbook is unique in that its bonuses regularly come in the form of FanCash, which can be used for bonus bets, along with sports merchandise from the Fanatics family of websites such as NFL Shop and NBA Store. For those who are into sports gear and memorabilia, this is a useful benefit.
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:
By considering these factors, we always make sure you're only getting the best MLB betting promos out there.
New to sports betting? Or at least the bonus part of it? We've got you covered. Here are a few of the most common types of MLB betting promotions that you're likely to encounter:
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 ~$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, 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.
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 an 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.
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.
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:
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.
It depends, as some sportsbooks require a promo code, while others do not. For example, FanDuel does not currently require a promo code to unlock their MLB betting bonuses for new users. However, at BetMGM, you'll need to use our exclusive promo code to take advantage of their offer.
There are a lot of great options, but I'd consider DraftKings Sportsbook's promotion to be the best promotion for MLB bettors right now. All you have to do is sign up and wager $5+. Then, you get your bonus bets, which can be used on subsequent MLB games.
Yes. In fact, I'd encourage you to do so. You can sign up at every licensed sportsbook in your state, claim their MLB betting promo, and use the bonus funds to try out the app for yourself. It's a great way to find out which sportsbook is best for you without risking too much of your own money.