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BetMGM bonus code for MLB on Monday, August 4

Sports fans can use the latest BetMGM promo code to secure up to $1,500 in bonus bets

ByUpdated: Aug 04, 2025 2:28PM UTC . 4 min read

Thirteen games will take place on the diamond on Monday, August 4, as MLB takes center stage in the sports world. Things get going with the red-hot Miami Marlins facing the Houston Astros and conclude with the St. Louis Cardinals visiting the Los Angeles Dodgers. Those interested in MLB betting can use the latest BetMGM bonus code SPORTSLINE to get up to $1,500 in bonus bets.

How to claim the BetMGM promo

Here's how the BetMGM promotional offer works and how to sign up. You must be a new user 21 or older in a state where BetMGM operates.

  1. Click "CLAIM BONUS" on this page. You'll be redirected to BetMGM.
  2. Create an account by entering all required information such as name, email and payment details. Be sure to use the code SPORTSLINE when signing up.
  3. Make a minimum deposit of $10.
  4. Place a wager on any market. There is no minimum odds requirement.

BetMGM will issue bonus bets if your first bet loses up to $1,500. If your wager is less than $50, you'll get a single bonus bet slip in that amount. If your wager is $50 or more, you'll get five equal bonus bet slips. For example, if you wagered $100 and your wager lost, you'd get five $20 bonus bet slips.

Bonus bets cannot be cashed out or withdrawn, and they expire in seven days. If you win a wager using bonus funds, you'll get the winnings but not the stake.

Here are the best sportsbook promos available from the top sportsbooks, including BetMGM.

Best bets for Monday, August 4

The Marlins, who were 16 games under .500 at one point in the season, have achieved a 55-55 mark heading into Monday's contest against the struggling Astros. Miami is on a five-game winning streak and has won eight of its last 10, while Houston is on a three-game skid and has lost eight of its last 10. The Marlins send Sandy Alcantara (6-9, 6.36 ERA) to the bump while the Astros counter with Jason Alexander (1-1, 7.36 ERA). The SportsLine Projection Model likes the Marlins on the money line as -129 favorites (wager $129 to win $100). Miami wins in 54% of simulations to bring value at these odds.

In what has shaped up to be a wild race for the top seed in the NL, the Dodgers suddenly find themselves chasing both the Brewers and Cubs for home-field advantage throughout the playoffs. Los Angeles has recovered nicely from a slump before the All-Star break, winning four of its last six ahead of a series with the Cardinals. St. Louis is likely to fade a bit after dealing away players at the trade deadline, but the Cardinals are still just 6.5 games back in the NL Wild Card standings. Los Angeles is rolling with Tyler Glasnow (1-1, 3.38 ERA) for this contest, while St. Louis sends Sonny Gray (10-5, 4.38 ERA) out. The Dodgers are -190 favorites (wager $190 to win $100) in the latest SportsLine consensus odds, and the model backs them on the money line as they win in 63% of simulations to bring value at those odds.

Responsible Gaming

BetMGM takes responsible gaming seriously and offers users tools such as setting deposit limits, taking timeouts and using self-exclusion measures to practice gaming responsibly. Users can also get in touch with support 24/7 via BetMGM's live chat feature. Those needing further assistance can contact state and national helplines, such as 1-800-GAMBLER, through BetMGM's app and website.

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Chinmay Vaidya
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