The MLB season is in full swing, and there’s still time to take advantage of the best MLB betting promos available from top sportsbooks. Today’s slate includes two primetime matchups: Mets vs. Marlins at 6:40 p.m. ET and Diamondbacks vs. Yankees at 7:05 p.m. ET.
Whether you’re looking to back your favorite team or explore player props, these MLB betting promos offer thousands in bonus value for new users who sign up and place their first wager.
These welcome offers include bonus bets, deposit matches, and first-bet insurance—perfect for building your bankroll during the early weeks of the season. From moneylines and run lines to total bases props and strikeout totals, you can apply these promos to virtually any MLB bet type.
Sign up today using any of the MLB betting promos below and start wagering on tonight’s MLB odds. Make sure to also check out our expert MLB picks, player props, and starting pitcher projections to help guide your bets.
Browse the chart below to find the right MLB betting promos for you, then continue reading for insight and advice on how to get the most value out of today’s action.
| Top MLB Sportsbooks | MLB Betting Promos for Opening Weekend | Sign-Up Link |
|---|---|---|
| bet365 | $150 Bet-and-Get or $1,000 First Bet Safety Net | TOPACTION |
| Fanatics Sportsbook | $300 Bet-and-Get Promo or $1,000 in No Sweat Bets | Click Here |
| BetMGM | Bet $10, Get $150 in Bonus Bets if You Win | ACTIONGET |
| Caesars Sportsbook | Get 10 100% Profit Boost Tokens | ACTION4DYW |
MLB Betting Promos, Predictions, and Starting Pitchers for April 1
1. bet365
- bet365 Bonus Code: TOPACTION
- bet365 Promo: $1,000 First Bet Safety Net or Bet $5, Get $150 in Bonus Bets, Win or Lose
- bet365 PA Promo: Bet $5, Get $150 in Bonus Bets + 50 Casino Spins, Win or Lose
- bet365 States Available: AZ, CO, IA, IL, IN, KY, LA, NC, NJ, OH, PA, TN, VA
Sign up with the bet365 bonus code TOPACTION to choose from two valuable MLB betting promos—either a bet $5, get $150 in bonus bets deal that pays out no matter the result, or a $1,000 First Bet Safety Net that refunds your first wager in bonus bets if it loses.
If you're in Pennsylvania, the $150 bet-and-get offer is even better. PA residents get 50 spins for bet365 Casino on top of the $150 bonus when they sign up with the bet365 bonus code TOPACTION.
2. Fanatics Sportsbook
- Fanatics Sportsbook Promo: Click Here
- Fanatics Sportsbook Bet-and-Get Promo: Bet $30, Get $300 in Bonus Bets
- Fanatics Sportsbook Sign-Up Bonus: $1,000 in No Sweat Bets
- Fanatics Sportsbook NY Sign-Up Bonus: 300% Profit Boost Token
- Fanatics Sportsbook States Available: AZ, CO, CT, DC, IA, IN, KS, KY, LA, MA, MD, MI, NJ, OH, PA, TN, VA, VT, WV, WY
Fanatics Sportsbook has multiple Fanatics Sportsbook promo offers available to help you boost your MLB betting bankroll, including one of the most popular MLB betting promos on the market.
Fanatics Sportsbook’s headline offer gives new users up to $300 in bonus bets across their first three days on the platform.
Here’s how it works:
- Place a $10+ wager each day for three straight days
- After each qualifying wager settles, receive $100 in bonus bets
- That’s a total of $300 in bonus bets to use on any MLB wager, including props and totals
If you’re looking for more coverage, Fanatics Sportsbook also offers up to $1,000 in No Sweat Bets. This promo refunds losing No Sweat Bets—up to $100 per day—for 10 consecutive days, giving you more flexibility as you navigate early-season MLB betting.
New York bettors can also access an exclusive offer: a 300% Profit Boost Token on their first MLB wager. Follow the steps below to triple your profit in the Big Apple:
- Sign up and place a wager up to $50 on any MLB market
- If your bet wins, your profit is tripled—giving you a major payout boost
3. BetMGM
- BetMGM Bonus Code: ACTIONGET
- BetMGM Promo: Bet $10, Get $150 in Bonus Bets if You Win
- BetMGM Bonus Code: TOPTAN1600
- BetMGM Promo: 20% First Deposit Match, Up to $1,600 in Sports Bonus
- BetMGM Bonus Code: TOPACTION
- BetMGM Promo: $1,500 First Bet Offer
- BetMGM States Available: AZ, CO, DC, IA, IL, IN, LA, KS, KY, MA, MD, MI, NC, NJ, OH, PA, TN, VA, WV, WY
If you’re ready to jump into the MLB season, BetMGM Sportsbook is offering three valuable MLB betting promos, and you can pick the one that fits your betting style best.
Sign up with BetMGM bonus code ACTIONGET and place a $10+ first wager on any MLB market. If your bet wins, you receive $150 in bonus bets. This offer is available to new users in CO, MI, NJ, PA, and WV and is one of the best low-risk ways to get started.
Prefer to boost your bankroll with bonus funds? Register with BetMGM bonus code TOPTAN1600 in AZ, CO, DC, IN, IA, KS, KY, MA, MD, MI, NJ, NC, PA, TN, WV, or WY to get a 20% deposit match up to $1,600. A deposit of $10 or more qualifies you for bonus funds, though $8,000 is required to unlock the full bonus.
If you’re planning to place a larger wager, BetMGM’s First Bet Safety Net may be the better choice. Use BetMGM bonus code TOPACTION and get up to $1,500 back in bonus bets if your first bet loses. Available in AZ, DC, IA, IL, IN, LA, KS, KY, MA, MD, NC, OH, TN, VA, and WY, this offer refunds your stake in five equal bonus bet tokens.
4. Caesars Sportsbook
- Caesars Sportsbook Promo Code: ACTION4DYW
- Caesars Sportsbook Welcome Bonus: Bet $1, Get 10 100% Profit Boost Tokens
- Caesars Sportsbook States Available: AZ, CO, DC, IA, IL, IN, KS, KY, LA, MA, MD, ME, MI, NC, NJ, NY, OH, ON, PA, TN, VA, WV, WY
Doubling your profits on MLB bets is easier than ever, thanks to one of the top MLB betting promos available. Caesars Sportsbook is giving new users 10 Profit Boost Tokens. Just sign up with Caesars Sportsbook promo code ACTION4DYW and place a $1 first wager.
Here’s how to claim and use your Profit Boost Tokens:
- Register using the Caesars Sportsbook promo code ACTION4DYW
- Place a $1 first bet on any MLB market
- Instantly unlock 10 Profit Boost Tokens
- Apply each token on wagers up to $25 to double your profits on winning bets
These tokens are ideal for MLB betting, whether you’re wagering on moneylines, run lines, or player props. Just make sure to use them within 14 days of activation.
Alternative MLB Betting Promos
You don’t have to rely on traditional sportsbooks to have action on today's MLB games. Platforms like Kalshi and Underdog offer creative, engaging ways to back teams and players. So, whether you're trading outcomes or playing daily fantasy sports with MLB stars, the following platforms are great additions to the MLB betting promos above.
1. Kalshi Predictive Market
- Kalshi Promo Code: ACTION
- Kalshi Welcome Offer: Make $100 in Trades, Get $10 Sign-Up Bonus
- Kalshi States Available: 47 + Washington D.C. (Not available in New Jersey, Nevada, and Ohio)
Kalshi gives MLB fans a futures-style way to interact with the game. Instead of placing traditional bets, you trade on yes-or-no outcomes like “ AL East Winner?” or “ NL MVP Winner” The platform blends data and prediction in a clean, simple format that feels more like a stock market than a sportsbook.
Steps to claim your Kalshi bonus:
- Sign up using Kalshi promo code ACTION
- Make $100 worth of trades on any Kalshi market
- Receive a $10 bonus to keep trading and exploring
2. Underdog (DFS)
- Underdog Fantasy Promo Code: TOPACTION
- Underdog Fantasy Sign-Up Offer: 50% Deposit Match, Up to $1,000 in Bonus Funds
- Underdog Fantasy States Available: AL, AK, AZ, AR, CA, DC, DE, GA, IL, KS, KY, MA, MN, MO, NE, NM, NC, ND, OK, OR, RI, SC, SD, TN, TX, UT, VT, VA, WI, WV, WY
Step into the MLB DFS scene with Underdog, where you can enter daily drafts or create pick’em slips featuring players like Shohei Ohtani, Aaron Judge, and Juan Soto. It’s fast, intuitive, and fun for beginners and DFS veterans alike.
Use Underdog Fantasy promo code TOPACTION at signup, and Underdog matches 50% of your first deposit—up to $1,000. That means more chances to play, win, and build your bankroll all season long.
MLB Starting Pitchers & Predictions — Tuesday, April 1
The first pitch of today's slate is set for 6:40 p.m. ET. Below are the starting pitchers for two of the biggest games on the slate featuring both New York teams, along with predictions that you can use to maximize the MLB betting promos above.
New York Mets vs. Miami Marlins
- Time/Location: 6:40 p.m. ET at loanDepot Park (Miami, FL)
- Starting Pitchers: Kodai Senga (New York Mets) vs. Sandy Alcantara (Miami Marlins)
- Prediction: Under 7.5 (-105)
The Marlins lack power, so they rely on stringing together hits to generate offense—something that’s tough to do against Kodai Senga, who has the potential to be one of the NL’s best arms this season.
On the other side, while the Mets lineup is capable of putting up runs, they’ll have their hands full with Sandy Alcantara. He’s a workhorse on the mound and should go deep into the game if he limits his walks, which is likely as he settles into the season.
Arizona Diamondbacks vs. New York Yankees
- Time/Location: 7:05 p.m. ET at Yankee Stadium (Bronx, NY)
- Starting Pitchers: Corbin Burnes (Arizona Diamondbacks) vs. Will Warren (New York Yankees)
- Prediction: Diamondbacks ML -110
The clear edge on the mound belongs to Arizona, leaving the offensive battle as the deciding factor. While New York may have a slight advantage at the plate on paper, the Diamondbacks have been swinging the bats well to start the 2025 season.
Both teams rank top two in key offensive categories like runs, hits, batting average, OBP, slugging, and OPS. With the hitting gap being minimal, Arizona is the smarter side to back thanks to its significant advantage in starting pitching.
Use the best MLB betting promos now and tail one of both of these MLB best bets today.