Sunday hands you a 15-game MLB schedule with three national windows, and the best MLB betting promos turn that slate into value before first pitch. New customers claim more than $6,000 in combined welcome offers across ten sportsbooks and two prediction market apps.
The action starts early. Orioles vs. Rays kicks off at 12:15 p.m. ET on Peacock, Cardinals vs. Cubs follows at 3 p.m. ET on ABC from Wrigley Field, and Mariners vs. Astros closes the night at 7:20 p.m. ET on NBC and Peacock.
You keep every offer below, because each one belongs to a different operator. Sign up for all of them, spread your first bets across Sunday's slate, and bank the bonus bets from every account. Here is how the top MLB betting promos stack up.
| 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 Sunday, August 16
Ten sportsbooks and two prediction market apps all run new-user offers today, and none of them cancel each other out. Claim the MLB betting promos one at a time, then deploy each first bet on a different game. Orioles vs. Rays gives you an early-afternoon start, so your first result lands before the ABC window even opens.
Check the current MLB odds and the latest MLB picks before you commit any of these first bets. The offers pay out the same either way, but a sharper number stretches the value.
1. Fanatics Sportsbook
Fanatics Sportsbook matches your daily cash bet in FanCash, up to $100 per day and $1,000 across your first 10 consecutive game days. Stake at least $1 at odds of -500 or longer and the match lands regardless of the result, though skipping a day forfeits that day's value.
Sign up with Fanatics Sportsbook promo code ACTION26 and start day one on Cardinals vs. Cubs at Wrigley. Imanaga against Dobbins in the afternoon sun makes this one of the sharper spots on the board.
| 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
BetMGM covers your opening wager up to $1,500. A loss returns the full stake in bonus bets, which makes this the largest safety net among today's MLB betting promos.
Enter BetMGM bonus code TOPACTION at registration, then take your swing at Mariners vs. Astros on Sunday Night Baseball. Woo and Hunter Brown both bring swing-and-miss stuff to Daikin Park.
| 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
A $10 wager unlocks $150 in bonus bets at bet365, win or lose. The bonus bets hit your account as soon as your qualifying bet settles.
Click through to grab the bet365 bonus code offer and start with the 12:15 p.m. ET first pitch in Orioles vs. Rays. An early settle frees up your $150 for the afternoon and evening games.
| 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
DraftKings turns $5 into $150 in bonus bets instantly. It ranks as the lowest-cost entry among the MLB betting promos on this list.
Tap the DraftKings promo code link, deposit, and stake $5 on any market in Cardinals vs. Cubs. Your $150 arrives right away, so you spend it on the same slate.
| 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
FanDuel hands you a Bet Reset Token worth up to $200 on each of your first five days, which totals $1,000 in coverage. Wager at least $5, toggle the token on in your betslip before you confirm, and a losing bet returns bonus bets within 72 hours.
Follow the FanDuel promo code link and open with Mariners vs. Astros, an AL West game with real weight. Tokens expire 24 hours after they arrive and the bonus bets last seven days, so spend each one the day you get it.
| 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 refunds a losing first bet up to $1,000 in bonus bets. The app also doubles as a live-scores hub, keeping your MLB lineups and results in one place.
Register with theScore Bet promo code ACTNEWS before the afternoon window opens. Among these MLB betting promos, a $1,000 reset supports the biggest first swing.
| 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
betPARX insures your first wager at 100%, up to a $50 bonus bet. Pennsylvania bettors treat this one as a low-risk add-on.
Use betPARX promo code TANBONUS at sign-up and place the qualifying bet on any MLB game on the board. A small stake keeps the downside tiny while you learn the app.
| 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
Hard Rock Bet pays $150 in bonus bets on a winning $5 first wager, one of the simplest MLB betting promos on the board. Michigan and New Jersey customers qualify.
Grab the Hard Rock Bet promo code offer, then find the shortest price you like on Sunday's card. A favorite gives this structure the best hit rate.
| 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
BetRivers backs your opening wager with a second chance bet worth up to $500. The exact cap depends on your state.
Open an account through the BetRivers bonus code link and place your first bet on any MLB market. A loss sends a bonus bet straight back to your balance.
| 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
Borgata credits $100 in bonus bets instantly after a $20 first wager. New Jersey players collect before the afternoon games settle.
Register with Borgata bonus code ACTION and stake $20 on the MLB market of your choice. The instant credit rounds out your run through today's 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 |
Best MLB Prediction Market Apps on Sunday, August 16
Two prediction market apps also welcome new users this weekend, and they reach far more states than the MLB betting promos above. You buy contracts at a price in cents, then hold to settlement or exit early at the going rate.
1. Kalshi
Kalshi runs a CFTC-regulated exchange, so users in 42 states plus D.C. trade there. Contracts cover Sunday's games alongside markets on the MLB MVP race and the postseason field.
Sign up with Kalshi promo code ACTION, trade $25 and earn up to a $500 bonus. Mariners vs. Astros under the Sunday night lights gives you a natural first position.
| 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
Polymarket doubles your first $10 deposit into $20 of trading funds. Prices move all game long, so you exit a position at any point instead of waiting on a final score.
Enter Polymarket promo code ACTION when you register, then open a position on Orioles vs. Rays during the Peacock window. An early game leaves plenty of time to reload for the night.
| 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 |
How to Claim These MLB Betting Promos
Each sign-up takes about three minutes on your phone. Follow these steps for every operator:
- Tap any promo link on this page to open the operator's registration page.
- Enter your name, address, date of birth, and the last four digits of your SSN.
- Add the bonus code where the form asks for one, such as ACTION26 at Fanatics Sportsbook or TOPACTION at BetMGM.
- Confirm your location, because sportsbooks by state limit which offers you access.
- Deposit with a debit card, PayPal, or online banking.
- Place the qualifying wager listed in each offer above.
Availability changes by market, so check where sports betting is legal in your state before you deposit. Bettors in Arizona, Colorado, Maryland, Ohio, and Pennsylvania reach nearly every offer on this list, which makes those states the easiest places to run the full set of the best sports betting sites.
One more habit worth building: scan the MLB weather report before you fire. Wind at Wrigley swings totals in Cardinals vs. Cubs more than almost any other park in baseball.
