The MLB trade deadline hits at 6 p.m. ET on Monday, Aug. 3, and the timing lines up perfectly for bettors. Every one of the eight MLB games on the Monday night slate starts at 6:40 p.m. ET or later, so you get time to claim your MLB betting promos before first pitch and put the bonus bets to work once the deadline dust settles.
New customers across legal states can stack more than $4,000 in combined value right now. The best sports betting sites, Fanatics Sportsbook, BetMGM, bet365, DraftKings, FanDuel and more, each offer a separate welcome bonus, and nothing stops you from grabbing all of them.
Below you get every one of these MLB betting promos, the exact bonus code, and the states where each offer lives. Lock them in now that Tarik Skubal's off to the Dodgers and the rest of the deadline dominoes are falling fast.
| 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 MLB Trade Deadline Day
Each new-customer offer below stands on its own, so you claim them one after another to build a bankroll for Monday night. Sign up, deposit, and place the qualifying bet at each book to unlock the bonus. Then let the MLB trade deadline reshape the board.
How to Use your MLB Betting Promos on Deadline Day
Once the deadline passes at 6 p.m. ET Monday, the MLB odds for Monday's eight-game slate move fast. The board already shifted over the weekend: the Dodgers landed Tarik Skubal from Detroit, the Rays grabbed Freddy Peralta from the Mets, the White Sox pulled in Luis Castillo, and the Cubs added Kevin Gausman from Toronto — deals that reset MLB futures prices within minutes.
The action now turns to who's still on the block. Adley Rutschman, Jo Adell and Reid Detmers remain available, and wherever they land ripples straight into the night's MLB odds. Fresh bonus bets from these MLB betting promos give you the room to react the second lineups drop.
1. Fanatics Sportsbook
The Fanatics Sportsbook promo code ACTION26 unlocks a $1,000 Bet Match for new users. Fanatics Sportsbook matches your wagers in FanCash over your first 10 days, so you get value on every MLB trade deadline market you touch.
| 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 delivers a $1,500 First Bet Offer. Place your opening wager on any MLB game, and a loss returns your stake in bonus bets, up to $1,500, plenty of cushion for the Monday slate.
| 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 hands new customers a Bet $10, Get $150 in Bonus Bets deal that pays win or lose. This one ranks among the easiest MLB betting promos to clear, since a simple $10 stake triggers the full $150.
| 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 gives new users Bet $5, Get $150 Instantly in Bonus Bets. Your $150 lands the moment the qualifying bet settles, so you get instant firepower for the eight-game Monday card.
| 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 carries a Bet $5 Daily, Get Up To $1,000 In Bet Resets offer. FanDuel refunds a losing daily wager in bonus bets, which keeps you active through deadline day and the full week of MLB action.
| 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 activates a $1,000 First Bet Reset. A losing first wager comes back in bonus bets, up to $1,000, giving you a soft landing on the deadline-day markets.
| 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 covers your first bet with 100% Bet Insurance up to a $50 bonus bet. It's a low-commitment way to add another of these MLB betting promos to your stack.
| betPARX Promo Code | betPARX Sign-Up Offer | betPARX Legal States |
|---|---|---|
| betPARX Promo Code TANBONUS | 100% Bet Insurance, Up to $50 Bonus Bet | MD, NJ, PA |
8. Hard Rock Bet
The Hard Rock Bet promo code gives new users Bet $5, Get $150 in Bonus Bets if You Win. A winning $5 qualifier unlocks the full $150 for Michigan and New Jersey bettors.
| 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 delivers a 2nd Chance Bet worth up to $500, depending on your state. A losing opening wager returns as a bonus bet, so you stay in the game through the Monday slate.
| 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 rounds out the list with a Bet $20, Get $100 Instantly in Bonus Bets offer for New Jersey players. Your $100 arrives right after the qualifying bet settles.
| Borgata Bonus Code | Borgata Welcome Offer | Borgata Legal States |
|---|---|---|
| Borgata Bonus Code ACTION | Bet $20, Get $100 Instantly in Bonus Bets | NJ |
MLB Prediction Markets for Deadline Day
Beyond the sportsbook MLB betting promos, prediction-market apps run their own sign-up offers and reach far more states. Trade on deadline outcomes and Monday's games with the referral deals below.
1. Kalshi
The Kalshi promo code ACTION rewards new traders with a Trade $25, Get up to $500 Bonus. Kalshi operates in more than 40 states, so it opens the action to bettors outside the licensed sportsbook map.
| 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 gives new users a Deposit $10, Get $20 Trading Bonus. It's a quick add to your deadline-day stack and, like Kalshi, reaches well over 40 states.
| 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 |
Claim Every Offer Before First Pitch
Deadline day rewards the prepared. Claim all of these MLB betting promos before 6 p.m. ET, and you head into the eight-game Monday slate with bonus bets ready across the best sports betting sites. Each offer stands alone, so sign up at every book your state supports and turn the busiest afternoon on the baseball calendar into your biggest bankroll of the season.
