$1500 Bonus Bets If Lose on Astros vs Mariners MLB: Use BetMGM Code

We’re in the home stretch of the 2026 MLB regular season, but there’s still time to take advantage of our sensational BetMGM promo code offer and claim up to $1,500 in bonus bets if your opening $10 wager does not win.

To qualify for this exclusive promo code bonus, you need to be at least 21 years old and located in one of these states: AZ, CO, DC, IA, IL, IN, KS, KY, LA, MA, MD, NC, NV, OH, TN, VA. Residents of New Jersey, Pennsylvania, Michigan or West Virginia can claim an alternative BetMGM welcome package that gives them up to $150 in bonus bets if their opening $10 wager is successful.

Up To $1500 in Bonus Bets Paid Back if your First Bet Does Not Win

Bet Now BetMGM Promo

Gambling problem? Call 1-800-GAMBLER or 1-800-MY-RESET (Available in the US) 877-8-HOPENY or text HOPENY (467369) (NY) 1-800-327-5050 (MA), 1-800-BETS-OFF (IA), 1-800-981-0023 (PR). 21+ only. Please Gamble Responsibly. See BetMGM.com for Terms. First Bet Offer for new customers only (if applicable). Subject to eligibility requirements. Bonus bets are non-withdrawable. In partnership with Kansas Crossing Casino and Hotel. Promotional offers not available in Mississippi, Massachusetts, New York, Ontario, or Puerto Rico.

Creating Your New BetMGM Account and Claiming Your Welcome Bonus

This is an extremely straightforward MLB betting bonus to claim and use. All you have to do is click the banners on this page and follow these simple steps:

1. After clicking the Sign Up button, complete the short registration form.
2. Insert our exclusive promo code in the text box on the sign up page.
3. Once you have completed your registration, go to your account page and add $10+ to your balance.
4. You now need to make a wager of between $10 and $1,500 on any BetMGM betting market.
5. If your bet loses, you will receive bonus bets equivalent to the sum of your losing wager. These bets need to be used within seven days on any BetMGM market. Any profits you make from these bets will be yours to keep.

Please note: If your initial $10+ wager wins, you will immediately be in profit and the offer will be completed.

Astros vs Mariners: Same Game Parlay Options

One of the best ways to use your bonus bets is by placing them on BetMGM’s MLB Same-Game Parlays attached to Tuesday’s Astros vs Mariners clash at T-Mobile Park. These special pre-made doubles give you enhanced odds on a selection that combines the moneyline with a prop or totals option. Alternatively, you can use your bonus bets on any of the 100+ other markets BetMGM will be running on the Astros-Mariners matchup. These markets include a vast array of team/player props, plus totals, spreads and moneyline selections.