MLB Opening Day has come and gone, and it’s not too late to cash in with the best MLB betting promos from the top sportsbooks. Whether you're backing your favorite team or looking to build your bankroll for the full season, these MLB betting promos offer thousands in bonus value just for signing up and placing your first wager.
New users can unlock welcome offers including bonus bets, first-bet offers, and deposit matches, perfect for getting in on Opening Weekend action. Whether you’re betting moneylines, run lines, or player props, these promos give you extra value to work with right from the first pitch.
Sign up today using any of the MLB betting promos below to start placing bets on today’s MLB odds. Be sure to check out our MLB predictions and best bets below, as well as each projected starting pitcher for today's slate.
Browse the chart below to find the right MLB betting promos for you, then keep reading for expert MLB picks, insights, and everything you need to bet smart on MLB Opening Weekend.
| 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 Opening Weekend Betting Promos, Predictions, and Probable Pitchers
It may be too early to say the 2025 MLB season is full swing, but with well over 100 games on the calendar for every team, its safe to say that you have plenty of time to claim the top MLB betting promos.
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 unlock two great offers—a bet $5, get $150 in bonus bets where you get your bonus even if it loses, or a $1,000 First Bet Safety Net that refunds your first wager in bonus bets, up to $1,000.
These bet365 sign-up promos give you two avenues to boost your bankroll throughout the first weekend of the MLB season.
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 offers, unlocked with a Fanatics Sportsbook promo, to boost your MLB betting bankroll, including one of the best MLB betting promos available.
Fanatics Sportsbook’s most popular sign-up offer gives you $300 in bonus bets across your first three days on the platform.
Here’s how it works:
- Place a $10+ wager each day for three consecutive days
- After each wager settles, you receive $100 in bonus bets
- That’s up to $300 total in bonus funds to use across any MLB market
For bettors who want extra peace of mind, Fanatics Sportsbook offers up to $1,000 in No Sweat Bets. This promotion gives you up to $100 in bonus bets per day for 10 straight days if your qualifying wager loses.
This is a strong choice for for the first week of MLB action, where early-season uncertainty makes a little protection go a long way.
New York bettors can triple their profit on any MLB wager with Fanatics Sportsbook's exclusive 300% Profit Boost Token.
Here’s how it works:
- Sign up and wager up to $50 on any Opening Day MLB market
- If your bet wins, your profit is tripled, giving you a massive payout
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 get in on the action, BetMGM Sportsbook is offering three strong MLB betting promos for Opening Weekend — and you can choose 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, and 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 it’s one of the best low-risk ways to get started with MLB betting this season.
For those that want to spread their bonus bets around register with the BetMGM bonus code TOPTAN1600 in AZ, CO, DC, IN, IA, KS, KY, MA, MD, MI, NJ, NC, PA, TN, WV, or WY, and you get a 20% deposit match up to $1,600. While an $8,000 deposit is needed to unlock the full bonus, any deposit of $10 or more qualifies you for bonus funds.
Planning to make a bigger first bet? Use the BetMGM bonus code TOPACTION and receive up to $1,500 back in bonus bets if your first wager loses. This offer is available in AZ, DC, IA, IL, IN, LA, KS, KY, MA, MD, NC, OH, TN, VA, and WY, and the refund is split into 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 is easier than ever, especially if you’re betting on an Opening Weekend matchup. Caesars Sportsbook is offering one of the best MLB betting promos of the season—just sign up with Caesars Sportsbook promo code ACTION4DYW to receive 10 Profit Boost Tokens after placing a $1 first wager.
Here’s how you can get started:
- Register using the Caesars Sportsbook promo code ACTION4DYW
- Place a $1 first bet on or any MLB market
- Instantly unlock 10 Profit Boost Tokens
- Use each token on bets up to $25 to double your profits if they win
These Profit Boost Tokens are perfect for MLB matchups as they offer plenty of betting angles. Just make sure to use your tokens within 14 days of receiving them.
Alternate MLB Opening Day Betting Promos
You’re not limited to traditional sportsbooks to get in on the MLB this weekend. Alternative platforms like Kalshi and Underdog offer unique ways to engage with the game, from predictive markets to daily fantasy contests featuring your favorite MLB stars.
1. Kalshi Predictive Market
- Kalshi Promo Code: ACTION
- Kalshi Welcome Offer: Make $100 in Trades, Get $10 Sign-Up Bonus
- Kalshi States Available: 48 + Washington D.C. (Not available in New Jersey and Nevada)
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 Opening Weekend Pitchers & Predictions — Saturday, March 29
Take a look below at the pitching matchups you can wager on today with the best MLB betting promos on Saturday, March 29:
- Brewers vs. Yankees, 1:05 p.m. ET: Nestor Cortes vs. Max Fried
- Angels vs. White Sox, 2:05 p.m. ET: Joel Soriano vs. Jonathan Cannon
- Twins vs. Cardinals, 2:15 p.m. ET: Joe Ryan vs. Erick Fedde
- Orioles vs. Blue Jays, 3:07 p.m. ET: Dean Kremer vs Max Scherzer
- Phillies vs. Nationals, 4:05 p.m. ET: Jesus Luzardo vs Jake Irvin
- Guardians vs. Royals, 4:10 p.m. ET: Gavin Williams vs. Seth Lugo
- Giants vs. Reds, 4:10 p.m. ET: Justin Verlander vs. Nick Lodolo
- Rockies vs. Rays, 4:10 p.m. ET: Antonio Senzatela vs. Zack Littell
- Pirates vs. Marlins, 4:10 p.m. ET: Bailey Falter vs. Victor Bellozo
- Red Sox vs. Rangers, 7:05 p.m. ET: Tyler Mahle vs. Walker Buehler
- Braves vs. Padres, 7:15 p.m. ET: Spencer Schwellenbach vs. Randy Vasquez
- Mets vs. Astros, 7:15 p.m. ET: Griffin Canning vs. Spencer Arrighetti
- Cubs vs. Diamondbacks, 8:10 p.m. ET: Shota Imanaga vs. Brandon Pfaadt
- Tigers vs. Dodgers, 9:10 p.m. ET: Reese Olson vs. Roki Sasaki
- Athletics vs. Mariners, 9:40 p.m. ET: Osvaldo Bido vs. Bryce Miller