Best MLB Sportsbook Promo Codes & Betting Bonuses

Best MLB Sports Betting Promo Codes

Check out below for the best sportsbook bonuses available from the top MLB betting sites available in the US. This page is updated continuously so check back during the season to see if any new offers have been added. Also, if you’re concerned about whether or not your state allows legal betting then check our where can I bet on MLB games legally.

Top MLB Betting Promos in May 2026

We've listed the top MLB promo offers and explained how they work, so you'll know how to claim them and get the most value out of the sportsbook of your choice.

1. Caesars Sportsbook MLB Promo

Caesars Sportsbook is offering a great sign-up bonus, perfect for newer sports bettors ready to go in swinging: Bet $1, Double Your Winnings 10x if you sign up using Caesars promo code WSNDYW.

With this promo, all you have to do is place your $1 qualifying bet, and Caesars will reward you with ten separate 100% profit boost tokens.

When you join Caesars Sportsbook, you'll also gain access to their excellent rewards program. This program offers more than just additional promos and online benefits; it also provides discounts on dining, shopping, and more at Caesars Entertainment properties.

This offer is ideal for MLB fans looking to place their first bet with the peace of mind that comes with a second chance. Plus, the rewards program enhances your overall experience with extra perks, promos, and exclusive discounts.

» Read our Caesars Sportsbook review to find out more.

⭐ WSN rating: 4.5/5
💰 Caesars Sportsbook MLB promo: Bet $1, Double Your Winnings 10x
🤩 Caesars Sportsbook MLB promo code: WSNDYW

Claim your Caesars MLB betting promo

2. FanDuel Sportsbook MLB Promo

FanDuel is pitching a fantastic promo for MLB fans: Bet $5, Get $150 in Bonus Bets.

Unlock your one-time welcome bonus by registering a new FanDuel Sportsbook account, making a minimum deposit of $5, and placing your first real-money wager of at least $5. This promotion is strictly tied to a winning outcome: score a victory on that initial bet, and you will walk away with exactly $150 in Sportsbook Bonus Bets, but a loss means no bonus will be credited. Be sure to let your wager ride until it officially settles, as utilizing the early cash-out feature, betting with existing promo funds, or applying profit boost tokens will instantly void your eligibility.

Once those bonus bets are in your account, you've got seven days to swing for the fences before they expire.

What I love about FanDuel's bonus bets is that they’re as flexible as a utility player. You’re not stuck with predetermined bonus bet packages like at other betting sites. Instead, you can use your bonus bets however you want. Whether you want to swing for the fences with a $150 bet or play it safe with 150 $1 bets, FanDuel gives you the freedom to play your way.

This FanDuel promo code is a great opportunity for MLB fans to come stuck up on bonus bets before the beginning of the season.

» Find out more in our detailed FanDuel Sportsbook review.

⭐ WSN rating: 4.5/5
💰 FanDuel MLB promo offer: Bet $5, Get $150 in Bonus Bets
🤩 FanDuel MLB promo code: No promo code required

3. BetMGM Sportsbook MLB Promo

BetMGM is currently offering a stellar promo for MLB fans. If you first wager doesn't hit you can score up to $1,500 in bonus bets.

To claim this offer, you'll have to register, use BetMGM promo code WSNSPORTS, deposit at least $10, and place a minimum $5 bet on any MLB game or other available sports markets. If your first bet strikes out, BetMGM will give you bonus bets equal to your wager.

The beauty of this promo is that the more you invest, the more bonus bets you stand to gain if your initial bet doesn’t win. If your first bet is successful, you won’t receive any bonus bets, but you’ll still walk away with your winnings. It’s essentially a win-win—you either get bonus bets or a winning payout.

But that’s not all: once you’re in the game with BetMGM, you’ll also gain access to one of the top loyalty programs in the sportsbook league.

The more you bet, the more reward points you accumulate, which translates into MVP-level perks like entertainment offers, room upgrades, and more. And that’s just the first inning.

This promo is perfect for sports betting beginners as it provides a safety net for your first bet, giving you added confidence to dive into the season’s games, and it's also good for seasoned bettors who want to go in big. With the potential for bonus bets if your initial wager doesn’t hit, you’ll stay in the game longer.

Plus, the perks from BetMGM’s loyalty program make it a top choice for committed bettors. If you appreciate being rewarded for your loyalty, this is the sportsbook for you.

» Get all the details in our BetMGM sportsbook review.

⭐ WSN rating: 4.5/5
💰 BetMGM MLB promo offer: Get Up to $1,500 in Bonus Bets
🤩 BetMGM MLB promo code: WSNSPORTS

Sign up at BetMGM

4. BetRivers Sportsbook MLB Promo

BetRivers has been on the field since 2019, and they’ve really expanded their roster since then, not just in operations but also in their MLB promo offerings.

Currently, BetRivers’ MLB promo can score you up to $500 in bonus bets if you’re in IL, IN, LA, MD, MI, PA, or VA; up to $250 in CO and NJ; and up to $100 in AZ, IA, NY, OH, and WV. It’s a standard second-chance offer, though the value is a bit lower compared to other sportsbooks out there. To lock in this offer, simply use a BetRivers bonus code WSNSPORTS when creating your account.

Even with a lower ceiling, this promo is perfect for those new to baseball betting. It gives you a chance to step up to the plate and take a few swings without committing too much, making BetRivers my top recommendation for beginners in MLB betting.

The site’s design is a bit old-school, which actually works to its advantage for newcomers. When you’re just starting out, you don’t need flashy graphics or a confusing layout throwing you off your game. That’s why I confidently recommend BetRivers as your go-to for a first sportsbook.

However, even though it’s beginner-friendly, you shouldn’t step into the batter's box without some prep work. Be sure to check out our learning hub before you start placing your MLB bets.

» Interested in more? Check out our detailed BetRivers Sportsbook review.

⭐ WSN rating: 4.2/5
💰 BetRivers MLB promo offer: $500 Bonus Bet
🤩 BetRivers MLB promo code: SPORTS

Sign up at BetRivers