Every one of the best MLB betting promos vetted by our team is live for new sign-ups ahead of first pitch, with a combined value of up to $5K in bonus bets up for grabs with sports betting sites.

Saturday's MLB card runs from the early afternoon window straight through to the West Coast nightcap, and the headline act is a nationally televised primetime triple-header on FOX:

• The Pittsburgh Pirates vs. Los Angeles Dodgers (7:15 p.m. ET at Dodger Stadium)
• The Chicago Cubs vs. Seattle Mariners (7:15 p.m. ET at T-Mobile Park)
• The San Francisco Giants vs. Boston Red Sox (7:15 p.m. ET at Fenway Park)

With instant bet-and-gets that pay out the moment your qualifier settles, multi-day reset structures built to cover an entire weekend series, a 10-day bet match that stretches deep into the next week and first-bet insurance for smaller bankrolls, there is something for everyone this MLB Saturday.

Every offer listed is for new customers only, and eligibility is state-by-state. Lock in the one that fits your jurisdiction before the 7:15 p.m. ET national window.

What MLB Betting Promos Can I Use on Saturday?

Saturday MLB Prices for the Key Nationally Televised Games

Game 1: Pittsburgh Pirates vs. Los Angeles Dodgers (7:15 p.m. ET | FOX | UNIQLO Field at Dodger Stadium, Los Angeles, CA)

• Moneyline: Pirates +220 | Dodgers -260
• Run Line: Pirates +1.5 (-105) | Dodgers -1.5 (-115)
• Run Total: Over 7.5 Runs (-110) | Under 7.5 Runs (-110)

Game 2: Chicago Cubs vs. Seattle Mariners (7:15 p.m. ET | FOX | T-Mobile Park, Seattle, WA)

• Moneyline: Cubs +100 | Mariners -120
• Run Line: Cubs -1.5 (+170) | Mariners +1.5 (-205)
• Run Total: Over 7.5 Runs (-105) | Under 7.5 Runs (-115)

Game 3: San Francisco Giants vs. Boston Red Sox (7:15 p.m. ET | FOX | Fenway Park, Boston, MA)

• Moneyline: Giants +180 | Red Sox -205
• Run Line: Giants +1.5 (-125) | Red Sox -1.5 (+105)
• Run Total: Over 8 Runs (-110) | Under 8 Runs (-110)

Odds accurate at time of publication and subject to change. MLB markets, prices, and totals are dynamic and will move prior to first pitch. Availability varies by sportsbook and by state. Always verify the current price in your app before placing a wager.

Best MLB Betting Promos for Saturday, Aug. 22, 2026

Every MLB betting promo below has been verified as live for Saturday's national television window and for the rest of the day's full board. Each breakdown covers the reward, the qualifying wager required to unlock it, the code you need at registration, accompanied by how and why these are the best MLB betting promos for our readers this Saturday.

Below are the top MLB betting promos available today.

1. Fanatics Sportsbook Promo Code ACTION26

New players who register with Fanatics Sportsbook promo code ACTION26 can earn up to $1,000 matched in FanCash across their first 10 days. The mechanic is simple: opt in each day, place a cash wager of $1 or more at minimum odds of -200, and Fanatics matches that stake in FanCash up to $100 per day. Ten consecutive qualifying days gets you to the $1,000 ceiling.

This is arguably the best-structured offer on the page for a baseball bettor, purely because of the calendar. MLB plays essentially every day, so the 10-day window is never wasted. Day one is Saturday's national triple-header, day two is Sunday's getaway games, and the remaining eight days carry you across two more full series.

• Fanatics Sportsbook Promo Code:ACTION26
• Welcome Offer: Up to $1,000 Matched in FanCash ($100 per day across 10 days)

• Minimum Wager: $1+ cash bet daily, minimum odds -200
• Eligible States: AZ, CO, CT, DC, IA, IL, IN, KS, KY, LA, MA, MD, MI, MO, NC, NJ, NY, OH, PA, TN, VA, VT, WV, WY

Additional Fanatics offer variants by state:

• 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
• Get 10x 100% Profit Boost Tokens Instantly — IL, NY

2. BetMGM Bonus Code TOPACTION

No MLB betting promo on this page carries a bigger ceiling than BetMGM bonus code TOPACTION, which backs up your opening wager with up to $1,500 in first bet back bonuses. Place your first cash bet on any of Saturday's featured games, and if it settles as a loss, BetMGM returns the stake in bonus bets up to $1,500.

That refund matters because of how unpredictable baseball is. Bullpen fatigue, a late-inning wild pitch, a defensive substitution, an unexpectedly short outing from a front-line starter, none of it is predictable.

So short-priced favorites lose outright far more often in MLB than in any other major sport. A $1,500 cushion is what lets you take a genuine swing at a plus-money underdog on the run line or back a strikeout-heavy starter without the result of one at-bat deciding your week.

• BetMGM Bonus Code:TOPACTION
• Welcome Offer: Up to $1,500 in First Bet Back Bonuses
• Minimum Deposit: $10
• Payout Mechanics: Losing qualifiers over $50 refunded as five 20% bonus tokens; under $50 refunded as a single token
• Eligible States: AZ, CO, DC, IA, IL, IN, KS, KY, LA, MA, MD, NC, OH, TN, VA, WY

Additional BetMGM offer variants by state:

• Bonus Code TANGET2 — $1,000 No Sweat Tokens — AZ, CO, DC, IA, IL, IN, KS, KY, LA, MD, MO, NC, OH, TN, VA, WY
• Bonus Code ACTIONGET — Bet $10, Get $150 in Bonus Bets if You Win — MI, NJ, PA, WV

3. bet365 Bonus Code

bet365 keeps things as simple as any book on this list, and for a sport like baseball, that is a real advantage. Deposit and wager just $10 on any market across Saturday's slate with the bet365 bonus code, and $150 in bonus bets lands in your account win or lose.

It gives you total freedom on the qualifying wager itself. You can put the $10 on an ace's strikeout prop, a road underdog moneyline, the total in a hitter's park, or a three-leg parlay stitched across all three featured games, and the payout is unaffected.

The $150 then arrives as bonus credit you can spread across Sunday's board, live in-game markets during the late West Coast window, or a Same Game Parlay built around a favorable pitching matchup.

• bet365 Bonus Code:Click Here (auto-applied via link)
• Welcome Offer: Bet $10, Get $150 in Bonus Bets, Win or Lose
• Minimum Deposit: $10
• Wagering Requirement: 1x playthrough on settled bonus bets
• Eligible States: AZ, CO, IA, IN, KS, KY, LA, MD, MO, NC, NJ, OH, PA, VA

Additional bet365 offer variants by state:

• $1,000 First Bet Safety Net — AZ, CO, IA, IL, IN, KS, KY, LA, MD, MO, NC, OH, TN, VA
• Bet $10, Get $150 in Bonus Bets Win or Lose, plus 50 Casino Spins — MI, NJ, PA

4. DraftKings Sportsbook Promo Code

The DraftKings promo code delivers the book's signature bet-and-get, and there is no code to type. The offer activates automatically when you register through the link on this page. A $5 first wager on any Saturday MLB market returns $150 in bonus bets, with no winning requirement and no waiting for a loss.

But it is how the DK promo code offer comes your way that sets it apart for baseball fans. Rather than dropping $150 into your account as one, DraftKings issues the reward in $50 increments over 14 days. This turns a single welcome offer into three separate betting weekends.

For a sport that plays six or seven days a week, that staggered set of bonuses is a perfect feature. It stops you from converting your entire bonus into one moneyline on one game, giving your bonuses for the next few MLB weekends.

• DraftKings Promo Code:Click Here (auto-applied via link)
• Welcome Offer: Bet $5, Get $150 in Bonus Bets
• Qualifying Wager: $5 real-money bet on any MLB market
• Token Expiry: Bonus tokens expire seven days (168 hours) after issuance
• Eligible States: 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 Sportsbook Promo Code

The FanDuel promo code offer is built for a full week of baseball rather than a single first pitch. Bet $5 a day and FanDuel issues bet resets worth up to $1,000 across a five-day window if your qualifying wager comes up short, with up to $200 refunded per day.

Five consecutive days of protection lines up almost perfectly with the rhythm of an MLB schedule. Day one is Saturday's national window, day two is Sunday, and days three through five carry you into the opening games of the next series. Each day resets independently, so a loss on Saturday does not consume your Sunday protection.

• FanDuel Promo Code:Click Here (auto-applied via link)
• Welcome Offer: Bet $5 Daily, Get Up to $1,000 in Bet Resets
• Refund Cap: Up to $200 refunded per day across five consecutive days
• Minimum Deposit / Bet: $10 deposit / $5 qualifying wager per day
• Eligible States: AZ, AR, CO, CT, DC, IA, IL, IN, KS, KY, LA, MA, MD, MI, MO, NC, NJ, NY, OH, PA, TN, VA, VT, WV, WY

6. theScore Bet Promo Code ACTNEWS

Register with theScore Bet promo code ACTNEWS and a $1,000 First Bet Reset is applied to your account. Take any market across Saturday's MLB board, and if your opening bet misses, the stake returns in bonus bets up to $1,000.

That ability to spread your bonus bets after the fact is what makes a reset genuinely useful in baseball. Concentrating a refund on a single game means one bad seventh inning wipes out both your original stake and your second chance. Splitting it across five slates gives your handicap a real sample size to work with.

• theScore Bet Promo Code:ACTNEWS
• Welcome Offer: $1,000 First Bet Reset
• Minimum Deposit: $10
• Eligible States: AZ, CO, IA, IL, IN, KS, KY, LA, MA, MD, MO, NC, OH, TN, VA

Additional theScore Bet offer variant by state:

• Promo Code ACTNEWS — Bet $10, Get $100 in Bonus Bets If You Win — MI, NJ, PA, WV

7. betPARX Promo Code TANBONUS

Pennsylvania bettors can claim betPARX promo code TANBONUS for 100% bet insurance up to $50. Place your first wager on any of Saturday's games, and if it loses, betPARX refunds the stake as a bonus bet up to $50.

• betPARX Promo Code: TANBONUS
• Welcome Offer: 100% Bet Insurance, Up to $50 in Bonus Bets
• Qualifying Wager: First real-money bet on any MLB market
• Payout Mechanics: Losing qualifier refunded as a bonus bet up to $50
• Eligible States: PA

8. Hard Rock Bet Promo Code

The Hard Rock Bet promo code gives new users a bet $5, get $150 offer that pays out when your opening wager wins. Back a side, run line, or total you actually trust on Saturday's slate, and a winning ticket returns your cash profit plus $150 in bonus bets on top.

The win condition means this is the offer for bettors with a genuine read rather than a coin flip. If you have a strong home favorite behind a front-line starter, or an Under in a pitcher-friendly park with the wind blowing in, the return on a $5 stake, plus the $150 in bonuses, could set you up better than any other promo on this page.

• Hard Rock Bet Promo Code:Click Here (auto-applied via link)
• Welcome Offer: Bet $5, Get $150 in Bonus Bets If Your Bet Wins
• Minimum Deposit: $10
• Eligible States: MI, NJ

9. BetRivers Promo Code

The BetRivers promo code second-chance structure suits the way most bettors approach a national TV slate — one considered opinion, one meaningful stake. Baseball punishes that approach more than most sports, because a two-run lead in the seventh is not a lead in any real sense, so having the stake come back after a bullpen collapse keeps you in play for Sunday rather than out of it.

• BetRivers Promo Code:Click Here (no code required)
• Welcome Offer: 2nd Chance Bet, up to a $500 bonus bet
• Qualifying Wager: First real-money bet on any MLB market
• Payout Mechanics: Losing qualifier refunded as a single bonus bet up to the state cap
• State-by-state caps:
  • Up to $500 — MI, PA
  • Up to $250 — NJ
  • Up to $100 — WV

10. Borgata Bonus Code ACTION

Put $20 on any market across Saturday's slate and Borgata bonus code ACTION credits $100 in bonus bets to your account regardless of how the initial bet goes.

Win-or-lose bet-and-gets are the lowest-friction way into a new app, and the modest $20 threshold makes this one of the more accessible offers on the page. For a New Jersey bettor, the $100 in credit is enough to cover a full weekend of smaller positions. A run line Saturday, a total Sunday, and a strikeout prop on Monday's series opener all without ever putting the original bankroll at risk beyond the qualifier itself.

• Borgata Bonus Code:ACTION
• Welcome Offer: Bet $20, Get $100 in Bonus Bets
• Qualifying Wager: $20 real-money bet on any MLB market
• Eligible States: NJ

MLB Prediction Market Promos for Saturday's Slate

Prefer to trade a contract rather than place a bet? Both CFTC-regulated prediction market exchanges below have new-user offers live for Saturday's baseball, and they operate in a long list of states where traditional MLB betting promos are unavailable.

They also have their own prediction market promos for readers to check out.

1. Kalshi Promo Code ACTION

Kalshi is a CFTC-regulated event contract exchange, which means users trade outcome markets against one another rather than betting into a sportsbook's house edge. New users who sign up with Kalshi promo code ACTION and trade $25 receive $25 in bonuses in your balance.

Fund the account, place $25 in qualifying trade volume on any of Saturday's featured games, and the bonus posts automatically once the trade settles. The randomized structure means the exact figure varies by user, but the qualifying threshold is fixed at $25 regardless of what you receive.

• Kalshi Promo Code:ACTION
• Welcome Offer: Trade $25, Get $25
• Qualifying Threshold: $25 in cumulative settled trade volume within 30 days
• Regulatory Body: Commodity Futures Trading Commission (CFTC)
• States Available: 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, WI, WV, WY

2. Polymarket Promo Code ACTION

The Polymarket promo code ACTION credits new traders with a $20 bonus after a $10 deposit, tripling your starting balance before first pitch with no qualifying trade required. Like Kalshi, Polymarket operates as a CFTC-regulated exchange, so contracts on Saturday's featured matchups are live across a wide list of states where a conventional sportsbook may not be.

• Polymarket Promo Code:ACTION
• Welcome Offer: Deposit $10, Get $20 Instant Trading Bonus (no qualifying trade required)
• Minimum Deposit: $10 via ACH, debit card, or Apple Pay
• Credit Rules: Non-withdrawable trading credits with a 1x playthrough requirement on net profits
• Regulatory Body: Commodity Futures Trading Commission (CFTC)
• States Available: 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

Which MLB Betting Promo Should You Claim on Saturday?

There is no single best answer, because the right offer depends on how you intend to bet the rest of the week:

• Betting every day through the next series? The Fanatics 10-day bet match and the FanDuel five-day reset structure are the two offers built to reward daily volume.
• Making one considered play on the national window? BetMGM's $1,500 first bet back offer and theScore Bet's $1,000 reset carry the highest ceilings on a single wager.
• Want the bonus guaranteed regardless of result? bet365, DraftKings, and Borgata all pay out win or lose.
• Confident in a specific side or total? Hard Rock Bet's win-contingent offer returns the best ratio on a $5 stake.
• In a state without full sportsbook access? Kalshi and Polymarket cover a far wider map through CFTC-regulated event contracts.

Most bettors will be eligible for more than one. Because these are all new-customer offers, claiming two or three across different books is the most efficient way to build a Saturday bankroll.

MLB Schedule for Saturday, August 22nd, 2026