MLB Betting Promos: Claim Thousands in Bonus Value for Red Sox-Dodgers, Any Game Today

The MLB regular season keeps rolling with a marquee interleague matchup, and there's no better time to lock in MLB betting promos than right now. The Boston Red Sox travel to Chavez Ravine to close out their three-game set against the Los Angeles Dodgers today, Aug. 2, and the country's biggest sports betting apps are handing out some of the strongest welcome offers of the summer to get you in the game.

Below, we've rounded up the top MLB betting promos to claim ahead of first pitch, walked through exactly how to sign up, and previewed what to expect when Boston and Los Angeles square off in the series finale. Stack thousands of dollars in bonus bets, profit boosts, and first-bet insurance across the leading operators, all in time for tonight's Red Sox vs. Dodgers showcase.

Best MLB Betting Promos for Red Sox vs. Dodgers

Here are the top MLB betting promos available for new users heading into today's Red Sox vs. Dodgers matchup. Each of these is a first-time offer, so you'll need a fresh account to qualify.

Fanatics Sportsbook Promo Code ACTION26

Our Fanatics Sportsbook promo code activates a Bet and Get deal worth as much as $1,000 in FanCash. New customers receive a matched No Sweat Bet every day for a defined stretch, up to $100 daily across 10 days, and any losing wager gets returned to you in FanCash. Added up over the full run, that comes out to as much as $1,000 in coverage.

This is one of the MLB betting promos built for daily bettors, because it rewards you for returning to the app each day instead of demanding a single large qualifying wager. Today's Red Sox vs. Dodgers finale is a solid spot to start the sequence.

BetMGM Bonus Code ACTION1550

The BetMGM bonus code ACTION1550 provides a First-Bet Offer worth up to $1,500 in bonus bets, plus $50 in BetMGM Rewards Points. Register, make a qualifying deposit and place your first wager: win it and the cash is yours; lose it and BetMGM returns your stake in bonus bets, up to $1,500. Bigger opening bets on tonight's game are backed by the full amount, which makes this a fit for bettors looking to swing a little harder on the Dodgers or Red Sox.

Double-check the bonus code tied to one of the four MLB betting promos from BetMGM Sportsbook before you sign up, since the individual codes differ by welcome offer and by state.

bet365 Bonus Code

The bet365 bonus code opens up a "Bet $5, Get $150 in Bonus Bets" welcome offer, one of the friendliest MLB betting promos around, since the bonus arrives no matter how your first bet turns out. Lay a $10 wager on the Red Sox or Dodgers moneyline, and bet365 credits $150 in bonus bets whether that opening ticket wins or loses.

That win-or-lose format is what makes this one of the best MLB sign-up bonuses available. You don't have to sweat your qualifying bet, and the $150 in bonus bets can be spread across any markets bet365 lists, including run lines, totals and player props on tonight's game.

DraftKings Promo Code

DraftKings has a "Bet $5, Get $150 in Bonus Bets" offer going, and no DraftKings promo code is necessary, as the deal kicks in automatically when you register through our qualifying link. Deposit at least $5, place a $5 wager on any market priced at -500 or longer, and $150 in bonus bets hits your account right away.

This DraftKings promo pays out win or lose, which keeps the risk low for new users. A $5 moneyline bet on the Dodgers or a total on the Red Sox-Dodgers game is all you need to unlock the full $150 in bonus bets with one of the top MLB betting promos.

FanDuel Promo Code

FanDuel goes a different route with its welcome offer, and no FanDuel promo code is required to claim it. New users can bet $5 a day for five days in a row and pick up as much as $1,000 in bet resets. Every day your $5 qualifying wager comes up short, FanDuel refunds you up to $200 in bet resets, so the safety net can reach as high as $1,000 over the week.

That makes this one of the more flexible MLB betting promos for daily baseball bettors. Begin with tonight's Red Sox vs. Dodgers game and let the offer carry through the rest of the week's slate, giving yourself insurance on five different days of action.

Hard Rock Bet Promo Code

Hard Rock Bet keeps its welcome offer straightforward, and no Hard Rock Bet promo code is needed. Sign up, deposit, and place a first wager of at least $5 on Red Sox vs. Dodgers or any other market. If that opening bet wins, Hard Rock Bet credits $150 in bonus bets, handed out as six $25 bonus bets you can spread across upcoming games.

The one catch here is that the qualifying bet has to win to unlock the $150. This is a bet-and-get offer rather than a bet-back safety net. For that reason, plenty of bettors aim a small $5 wager at a shorter-priced favorite, like the Dodgers at home, to give the qualifying ticket the best shot at cashing.

theScore Bet Promo Code ACTNEWS

theScore Bet promo code ACTNEWS delivers a First Bet Reset worth up to $1,000. Put down your opening cash wager on any market, and if it loses, theScore Bet returns your full stake in bonus bets. The reset applies automatically when you register with our respective code.

There's a handy twist to how the refund arrives: instead of one lump credit, the reset comes as five separate bonus bets, each worth 20% of your losing stake. That gives you several chances to convert the insurance into real winnings across the MLB slate with one of the top MLB betting promos.

Kalshi Promo Code ACTION

Kalshi is a CFTC-regulated prediction market rather than a conventional sportsbook, meaning users trade contracts on real-world outcomes, MLB games included. The Kalshi promo codeACTION welcome offer works a little differently from the MLB betting promos above: trade $25 across any markets, and Kalshi credits a randomized bonus worth up to $500 once you clear that threshold.

The bonus arrives after your first $25 in trades goes through, and it doesn't depend on whether those trades win or lose. Spread the $25 across a few smaller trades to get a feel for the platform or apply it to Red Sox vs. Dodgers contracts, such as which team wins or how many total runs score.

Polymarket Promo Code ACTION

Polymarket, the biggest prediction market on the planet, came back to U.S. traders after securing CFTC clearance and buying a regulated exchange in late 2025. Much like Kalshi, the Polymarket promo code ACTION is available to eligible users 18 and older and trades in event contracts rather than sportsbook-style bets. The current welcome offer asks you to make a qualifying deposit of at least $10, and $20 in trading credit is added to your balance.

One point to remember: the $20 bonus comes as non-withdrawable trading credit, though any profits you generate with it can be cashed out. Direct those funds toward MLB markets like the Red Sox-Dodgers game or a broad selection of politics, economics and entertainment contracts today.