Register now at top online sports betting sites and claim the best MLB betting promos for Opening Day today. Sign up with the best MLB betting promos featured on this page and claim your sportsbook sign-up bonus from each betting app. In total, there is more than $6,000 in sign-up bonuses available at the best sportsbooks, including bet365, BetMGM, Fanatics Sportsbook, and Caesars Sportsbook.
Use these MLB betting promos for Opening Day now to get in on the MLB betting action. The chart below contains sign-up links for the best MLB betting promos for Opening Day to click the link(s) that correspond to each sportsbook to get started today:
| Best MLB Sportsbooks | MLB Betting Promos for Opening Day | Sign-Up Link |
|---|---|---|
| bet365 | $1,000 First Bet Safety Net or $150 Bet-and-Get | TOPACTION |
| BetMGM | Bet $10, Get $150 in Bonus Bets if You Win | ACTIONGET |
| Caesars Sportsbook | Bet $1, Get 10 100% Profit Boost Tokens | ACTION4DYW |
| Fanatics Sportsbook | $1,000 in No Sweat Bets or $300 Bet-and-Get | Click Here |
MLB Betting Promos to Claim on Opening Day — March 27
Sign up with the best MLB betting promos today, March 27, and bet on Opening Day MLB games. Read below for more info on each of the MLB sportsbook sign-up offers you can claim now.
bet365
| bet365 Promo | States Available | bet365 Bonus Code |
|---|---|---|
| $150 Bet-and-Get | AZ, CO, IA, IL, IN, KY, LA, NC, NJ, OH, TN, VA | TOPACTION |
| $1,000 First Bet Safety Net | AZ, CO, IA, IL, IN, KY, LA, NC, NJ, OH, TN, VA | TOPACTION |
| $150 Bet-and-Get + 50 Casino Spins | PA | TOPACTION |
Register with the bet365 bonus code TOPACTION to claim one of three MLB betting promos for Opening Day. All offers require a $10+ initial deposit, -500 minimum odds first bet, and any bonus you receive is valid for seven days. Let's look at how each bet365 promo works when you place a $100 first bet on the Dodgers -1.5 (+130) in Tigers vs. Dodgers at 7:10 p.m. ET:
- Bet-and-Get: If the bet wins, I receive $130 in profit, my $100 stake back, and $150 in bonus bets. If the bet loses, I receive $150 in bonus bets.
- First Bet Safety Net: If the bet wins, I receive $130 in profit and my $100 stake back. If the bet loses, I receive $100 in bonus bets.
- PA Exclusive Offer: If the bet wins, I receive $130 in profit, my $100 stake back, $150 in bonus bets, and 50 casino spins. If the bet loses, I receive $150 in bonus bets and 50 casino spins.
BetMGM
| BetMGM Promo | States Available | BetMGM Bonus Code |
|---|---|---|
| $150 Bet-and-Get | CO, MI, NJ, PA, WV | ACTIONGET |
| $1,600 Deposit Match Offer | AZ, CO, DC, IN, IA, KS, KY, MA, MD, MI, NJ, NC, PA, TN, WV, WY | TOPTAN1600 |
| $1,500 First Bet Promo | AZ, CO, DC, IA, IL, IN, LA, KS, KY, MA, MD, MI, NC, NJ, OH, PA, TN, VA, WV, WY | TOPACTION |
There are three different MLB betting promos for Opening Day available with a BetMGM bonus code today. Here is a look at the how the bet-and-get and first bet promo work when you place a $100 first bet on the Mariners -1.5 (+110) in Athletics vs. Mariners at 10:10 p.m. ET:
- Bet-and-Get (BetMGM bonus code ACTIONGET): If the bet wins, I receive $110 in profit, my $100 stake back, and $150 in bonus bets. If the bet loses, I receive nothing.
- First Bet Promo (BetMGM bonus code TOPACTION): If the bet wins, I receive $110 in profit and my $100 stake back. If the bet loses, I receive $100 in bonus bets that expire in seven days.
Instead of either of these betting offers, use the BetMGM bonus code TOPTAN1600 for a 20% deposit match of up to $1,600 in sports bonus. The offer has a 10x rollover requirement. Say I make an initial deposit of $2,000. I receive $400 in sports bonus and must wager through $4,000 in 30 days to withdraw any winnings.
Caesars Sportsbook
| Caesars Sportsbook Sign-Up Bonus | States Available | Caesars Sportsbook Promo Code |
|---|---|---|
| Bet $1+, Get 10 100% Profit Boost Tokens | AZ, CO, DC, IA, IL, IN, KS, KY, LA, MA, MD, ME, MI, NC, NJ, NY, OH, ON, PA, TN, VA, WV, WY | ACTION4DYW |
When you register with the Caesars Sportsbook promo code ACTION4DYW and place a $1+ first bet to receive 10 100% Profit Boost Tokens. Each Token can be applied to wagers up to $25 and expires 14 days following receipt. The 100% boost doubles your potential winnings on each wager when applied.
Fanatics Sportsbook
| Fanatics Sportsbook Promo | States Available | Sign-Up Link |
|---|---|---|
| Bet and Get up to $1,000 in No Sweat Bets | AZ, CO, CT, DC, IA, IL, IN, KS, KY, LA, MA, MD, MI, NC, NJ, OH, PA, TN, VA, VT, WV, WY | Click Here |
| Bet $30, Get $300 in Bonus Bets | AZ, CO, CT, IN, LA, MA, MD, MI, NJ, PA, TN, VA, WV | Click Here |
| Sign Up and Get a 300% Profit Boost Token | NY | Click Here |
Register now and claim one of three Fanatics Sportsbook promo offers. The sign-up bonus available in most states is a $1,000 No Sweat Bets offer. Receive 10 days of $100 No Sweat Bet opportunities and opt-in each day to claim your individual offer. Instead of this sign-up bonus in select states, claim a $300 bet-and-get offer that provides three days of bet $10, get $100 in bonus bets promos. If you register in New York, you receive a 300% Profit Boost Token just for signing up.
Alternative to MLB Betting Promos for Opening Day: Kalshi
| Kalshi Sign-Up Bonus | States Available | Kalshi Promo Code |
|---|---|---|
| Trade on Sports & Politics – Get a $10 Bonus with Our Code | AL, AK, AZ, AR, CA, CO, CT, DE, FL, GA, HI, ID, IL, IN, IA, KS, KY, LA, ME, MD, MA, MI, MN, MS, MO, MT, NE, NV, NH, NJ, NM, NY, NC, ND, OH, OK, OR, PA, RI, SC, SD, TN, TX, UT, VT, VA, WA, WV, WI, WY, DC | ACTION |
If legal online sports betting isn't available in your state yet, Kalshi represents an excellent alternative option to the best MLB betting promos for Opening Day. Register with the Kalshi promo code ACTION to claim a $10 bonus when you complete $100 in total trades.