The Seattle Mariners travel to take on the Athletics on Monday, May 25, 2026, in an important divisional matchup. New sports bettors can get a special boost for this game by using the Caesars Sportsbook promo code WSNDYW. This introductory promotion gives you the chance to Bet $1, Double Your Winnings 10x on the game, with a maximum value of up to $250. It is a simple way to get some extra action on the field as these two American League West clubs battle for position.

When you sign up for a new account on Monday, you can enter the Caesars Sportsbook promo code WSNDYW to activate the registration offer. This deal lets you place a small $1 opening wager and get 10 separate tokens to double your winnings on future bets. The maximum extra value you can get from these tokens is capped at $250.
This offer is available to eligible new users who are physically located in states where the sportsbook legally operates. These states include Arizona, Colorado, Indiana, Iowa, Illinois, Kansas, Kentucky, Louisiana, Maryland, Massachusetts, Michigan, New Jersey, New York, North Carolina, Ohio, Pennsylvania, Tennessee, Virginia, West Virginia, and Wyoming. If you live in Washington D.C., a different welcome promotion may apply depending on current local regulations.
All users must be at least 21 years old to create an account and place a legal wager.
You must make an initial deposit of at least $10 into your new account.
You need to place a real-money bet of at least $1 on any available market to activate the boost tokens.
Winnings from the double-your-winnings profit boosts are paid out in cash, but the original boost token amount is not included in the payout.
Once the 10 profit boost tokens are credited to your account, you must use them within 7 days or they will expire.
Read our Caesars Sportsbook review and get more info.
This Monday night game features a classic division rivalry as the Seattle Mariners visit Sutter Health Park in West Sacramento to face the Athletics. The Athletics currently sit just above the Mariners in the tight AL West standings, making every game in this series vital for the early summer race. Seattle is looking to bounce back from some recent struggles, while the A's are trying to protect their home turf and stay on top of the division.
The starting pitching matchup adds plenty of intrigue to this game. Seattle sends veteran right-hander Luis Castillo to the mound, who is looking to right the ship after a tough start to the 2026 season where he carries a 1-5 record and a 6.41 ERA. The Athletics counter with Aaron Civale, who has been stellar this year with a 5-1 record and a 3.31 ERA. Bettors can utilize the Caesars Sportsbook promo code to back either starting pitcher or find value in alternative markets like player props for sluggers like Seattle's Julio Rodriguez or Oakland's Nick Kurtz.
| Team | Spread | Moneyline | Total (O/U) |
|---|---|---|---|
| Seattle Mariners | -1.5 (+135) | -115 | Over 10.5 (-110) |
| Athletics | +1.5 (-160) | -105 | Under 10.5 (-110) |
Note: Odds are subject to change. Lines taken from Caesars Sportsbook on Monday, May 25, 2026, at 7:30 AM EDT.
Bet $1, Double Your Winnings 10x
Target the Moneyline: Since the offer requires a $1 bet to get your 10 profit boosts, a straightforward moneyline wager is a clean way to start. Betting on the Athletics at -105 at home keeps your initial risk low while completing the requirement.
Spread Your Boosts: Once you receive your 10 tokens to double your winnings, do not put them all on one outcome. Spread them across different games or markets throughout the week to diversify your selections.
Look for Underdog Value: Profit boosts increase your potential payout on a win. Using a double-your-winnings token on small underdogs or plus-money props helps maximize the mathematical advantage of the boost percentage.
Practice Bankroll Management: Only bet money you can afford to lose. The bonus boosts offer extra potential returns, but they do not guarantee that any individual bet will win.
Date & Time: Monday, May 25, 2026, at 9:40 PM EDT
Location: Sutter Health Park, West Sacramento, California
TV Channel: NBCS-CA (Athletics local broadcast), Mariners.TV (Mariners local broadcast)
Streaming: Fubo, MLB.TV
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