The best MLB betting promos on the board hand new users more than $4,000 in combined bonuses, and every offer stays live through Wednesday's first pitch.
Wednesday, August 19 brings a full 15-game MLB slate, headlined by Yankees vs. Orioles at 6:35 p.m. ET on Prime Video.
Fanatics Sportsbook promo code ACTION26 leads the pack with a $1,000 bet match, and BetMGM bonus code TOPACTION answers with a $1,500 first-bet offer.
Sign up at more than one app, spread your action across the slate, and let each welcome bonus cover a different angle.
| MLB Sportsbooks | MLB Betting Promos | Sign-Up Link |
|---|---|---|
| Fanatics Sportsbook | $1,000 Bet Match | ACTION26 |
| BetMGM | $1,500 First Bet Offer | TOPACTION |
| bet365 | $150 Bet-and-Get Promo | Click Here |
| DraftKings Sportsbook | $150 Bet-and-Get Promo | Click Here |
| FanDuel Sportsbook | $1,000 Bet Resets | Click Here |
| theScore Bet | $1,000 First Bet Reset | ACTNEWS |
| betPARX | $50 Bet Insurance | TANBONUS |
| Hard Rock Bet | $150 Bet-and-Get Promo | Click Here |
| BetRivers | 2nd Chance Bet, Up to $500 | Click Here |
| Borgata | $100 Bet-and-Get Promo | ACTION |
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Best MLB Betting Promos for Wednesday, August 19
We ranked the 10 best MLB betting promos below, plus two prediction market bonuses. Scan the sportsbooks by state column in each table before you register, because where sports betting is legal still changes from border to border.
1. Fanatics Sportsbook
The Fanatics Sportsbook promo code ACTION26 matches one bet per day for 10 consecutive days, up to $100 each day, and any $1 wager at -200 or longer qualifies. Miss a day and you forfeit that day's match, so shop MLB odds across the full 15-game slate and log in every night.
Each match lands as FanCash, which you spend as bonus bets in the app or convert into official merchandise on Fanatics.com. FanCash expires seven days after it hits your account, so the Fanatics Sportsbook promo code ACTION26 pays off for bettors who stay active all 10 days.
| Fanatics Sportsbook Promo | Fanatics Sportsbook Sign-Up Bonus | Fanatics Sportsbook Legal States |
|---|---|---|
| Fanatics Sportsbook Promo Code ACTION26 | $1,000 Bet Match | AZ, CO, CT, DC, IA, IL, IN, KS, KY, LA, MA, MD, MI, MO, NC, NJ, NY, OH, PA, TN, VA, VT, WV, WY |
| Fanatics Sportsbook Promo Code (Click Here) | Bet $20, Get $350 in Bonus Bets | AZ, CO, CT, DC, IA, IN, KS, KY, LA, MA, MD, MI, MO, NC, NJ, OH, PA, TN, VA, VT, WV, WY |
| Fanatics Sportsbook Promo Code (Click Here) | Get 10x100% Profit Boost Tokens Instantly | IL, NY |
2. BetMGM
The BetMGM bonus code TOPACTION covers your opening wager up to $1,500, and a loss returns the full stake in bonus bets.
Bettors in Michigan, New Jersey, Pennsylvania, and West Virginia swap that offer for BetMGM bonus code ACTIONGET and turn $10 into $150 after a winning first bet.
| BetMGM Bonus Code | BetMGM Promo | BetMGM Legal States |
|---|---|---|
| BetMGM Bonus Code TOPACTION | $1,500 First Bet Offer | AZ, CO, DC, IA, IL, IN, LA, KS, KY, MA, MD, NC, OH, TN, VA, WY |
| BetMGM Bonus Code TANGET2 | $1,000 No Sweat Tokens | AZ, CO, DC, IA, IL, IN, LA, KS, KY, MD, MO, NC, OH, TN, VA, WY |
| BetMGM Bonus Code ACTIONGET | Bet $10, Get $150 Bonus Bets if You Win | MI, NJ, PA, WV |
3. bet365
The bet365 bonus code offer pays $150 in bonus bets on a $10 wager, win or lose, which ranks it among the friendliest MLB betting promos for a Yankees vs. Orioles moneyline play.
Several states get a $1,000 First Bet Safety Net version of the bet365 bonus code instead, so match the offer to your bankroll before you deposit.
| bet365 Bonus Code | bet365 Welcome Promo | bet365 Legal States |
|---|---|---|
| bet365 Bonus Code (Click Here) | Bet $10, Get $150 in Bonus Bets, Win or Lose | AZ, CO, IA, IN, KS, KY, LA, MD, MO, NC, NJ, OH, PA, VA |
| bet365 Bonus Code (Click Here) | $1,000 First Bet Safety Net | AZ, CO, IA, IL, IN, KS, KY, LA, MD, MO, NC, OH, TN, VA |
| bet365 Bonus Code (Click Here) | Bet $10, Get $150 in Bonus Bets, Win or Lose, 50 Casino Spins | MI, NJ, PA |
4. DraftKings
The DraftKings promo code offer turns $5 into $150 instantly in bonus bets, the simplest of all the MLB betting promos on this page.
DraftKings prices every starter matchup on the 15-game card, so pair the DraftKings promo code bonus with our MLB picks and ride the results.
| DraftKings Promo Code | DraftKings Welcome Offer | DraftKings Legal States |
|---|---|---|
| DraftKings Promo Code (Click Here) | Bet $5, Get $150 Instantly in Bonus Bets | AR, AZ, CO, DC, IA, IL, IN, KS, KY, LA, MA, MD, MI, MO, NC, NJ, NY, OH, PA, TN, VA, VT, WV, WY |
5. FanDuel
The FanDuel promo code offer starts with a $5 deposit, then issues a Bet Reset Token worth up to $200 for each day you place a $5 wager over five straight days, for $1,000 total.
Toggle the token on in your betslip before you confirm the wager, and a losing reset returns bonus bets within 72 hours that expire after 7 days. Read the MLB weather report before you touch a total with your FanDuel promo code token, since a wet forecast in Baltimore moves run expectations fast.
| FanDuel Promo Code | FanDuel Sign-Up Bonus | FanDuel Legal States |
|---|---|---|
| FanDuel Promo Code (Click Here) | Bet $5 Daily, Get Up To $1000 In Bet Resets | AZ, AR, CO, CT, DC, IL, IA, IN, KS, KY, LA, MA, MD, MI, MO, NC, NJ, NY, OH, PA, TN, VA, VT, WV, WY |
6. theScore Bet
theScore Bet promo code ACTNEWS resets your opening wager up to $1,000 in bonus bets after a loss.
The app builds parlays in seconds, so theScore Bet promo code ACTNEWS rewards bettors who react to MLB lineups in the late afternoon.
| theScore Bet Promo Code | theScore Bet Welcome Offer | theScore Bet Legal States |
|---|---|---|
| theScore Bet Promo Code ACTNEWS | $1,000 First Bet Reset | AZ, CO, IA, IL, IN, KS, KY, LA, MA, MD, MO, NC, OH, TN, VA |
| theScore Bet Promo Code ACTNEWS | Bet $10, Get $100 in Bonus Bets If You Win | MI, NJ, PA, WV |
7. betPARX
The betPARX promo code TANBONUS adds 100% insurance on your first bet, up to a $50 bonus bet, for Pennsylvania bettors.
Small ask, quick payback, and betPARX Promo Code TANBONUS covers any game on Wednesday's card.
| betPARX Promo Code | betPARX Sign-Up Offer | betPARX Legal States |
|---|---|---|
| betPARX Promo Code TANBONUS | 100% Bet Insurance, Up to $50 Bonus Bet | PA |
8. Hard Rock Bet
The Hard Rock Bet promo code offer pays $150 in bonus bets on a winning $5 first wager in Michigan and New Jersey.
Hard Rock ranks among the best sports betting sites for same-game parlays, so the Hard Rock Bet promo code fits a primetime broadcast.
| Hard Rock Bet Promo Code | Hard Rock Bet Welcome Bonus | Hard Rock Bet Legal States |
|---|---|---|
| Hard Rock Bet Promo Code (Click Here) | Bet $5, Get $150 in Bonus Bets if You Win | MI, NJ |
9. BetRivers
The BetRivers bonus code second-chance bet returns up to $500 in Michigan and Pennsylvania, with smaller caps in New Jersey and West Virginia.
BetRivers also posts daily boosts on run lines, so value continues after you clear the BetRivers bonus code welcome offer.
| BetRivers Bonus Code | BetRivers Sign-Up Bonus | BetRivers Legal States |
|---|---|---|
| BetRivers Bonus Code (Click Here) | 2nd Chance Bet: Get Up to a $500 Bonus Bet | MI, PA |
| BetRivers Bonus Code (Click Here) | 2nd Chance Bet: Get Up to a $250 Bonus Bet | NJ |
| BetRivers Bonus Code (Click Here) | 2nd Chance Bet: Get Up to a $100 Bonus Bet | WV |
10. Borgata
The Borgata bonus code ACTION turns a $20 wager into $100 in bonus bets instantly, and no win requirement applies.
New Jersey bettors treat Borgata bonus code ACTION as the fastest guaranteed payout among all MLB betting promos.
| Borgata Bonus Code | Borgata Welcome Offer | Borgata Legal States |
|---|---|---|
| Borgata Bonus Code ACTION | Bet $20, Get $100 Instantly in Bonus Bets | NJ |
Prediction Market Promos for the MLB Slate
Prediction markets reach more than 40 states, so traders outside sportsbook territory still get action on Yankees vs. Orioles, division races, and the MLB MVP market.
1. Kalshi
The Kalshi promo code ACTION delivers up to a $500 bonus once you trade $25 on the platform.
Kalshi lists single-game contracts alongside season-long markets, MLB MVP included, and the Kalshi referral code ACTION applies across both.
| Kalshi Promo Code | Kalshi Referral Offer | Kalshi States Available |
|---|---|---|
| Kalshi Promo Code ACTION | Trade $25, Get up to $500 Bonus | AK, AL, AR, CA, CO, CT, DC, DE, FL, GA, HI, IA, ID, IN, KS, KY, LA, ME, MN, MO, MS, NC, ND, NE, NH, NJ, NM, NY, OK, OR, PA, RI, SC, SD, TN, TX, UT, VA, VT, WA, WI, WV, WY |
2. Polymarket
The Polymarket promo code ACTION converts a $10 deposit into a $20 trading bonus, the lowest entry point of these MLB betting promos.
Prices swing quickly on baseball, so claim Polymarket referral code ACTION early Wednesday and let the 6:35 p.m. ET first pitch come to you.
| Polymarket Promo Code | Polymarket Referral Bonus | Polymarket States Available |
|---|---|---|
| Polymarket Promo Code ACTION | Deposit $10, Get $20 Trading Bonus | AK, AL, AR, CA, CO, CT, DC, DE, FL, GA, HI, IA, ID, IN, KS, KY, LA, ME, MN, MO, MS, NC, ND, NE, NH, NJ, NM, NY, OK, OR, PA, RI, SC, SD, TN, TX, UT, VA, VT, WA, WI, WV, WY |
