The Mariners will play the Guardians on Sunday, August 31st, 2025. Your timezone's first pitch time is 1:40 pm EDT. Check local listings or your nearest streaming app for coverage.
Learn more about MLB Betting with our handy tutorial and guide. We explain money line, total and run line bets. Plus, a great discussion about exotic bets like MLB Baseball parlays and props.
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Table of Contents
- Best Odds
- Interactive Odds Example
- Prop Bets
- Team Futures Odds
- Team Pages
- Team Standings
- Other Games Today
Best Mariners at Guardians Odds
| Underdog Cleveland Guardians | Favorite Seattle Mariners |
|---|---|
| Over | Under |
|---|---|
| Underdog Cleveland Guardians | Favorite Seattle Mariners |
|---|---|
Matchup Odds FAQs
The Seattle Mariners are the -115 moneyline favorite at BetMGM and the Cleveland Guardians are the -105 moneyline underdog at BetMGM.
The best over line is 8 -115 runs at BetMGM, which means you risk $115 to win $100 betting the over. The best under line is 8 -105 runs at BetMGM, and that means you risk $105 to win $100 betting the under.
The Seattle Mariners are -1.5 +150 run line favorites at BetMGM, while the Cleveland Guardians are +1.5 -185 run line underdogs at BetMGM.
MLB Odds Example
|
Game |
 BetMGMBet |
|---|---|
Mariners
Guardians
8/31/25 1:40pm EDT | -115-105 |
- Cleveland Guardians bettors risk $100 to win $95.24 at -105 odds. The implied probability for Cleveland Guardians is 51.22%.
- Seattle Mariners bettors risk $100 to win $86.96 at -115 odds. The implied probability for Seattle Mariners is 53.49%.
Seattle Mariners at Cleveland Guardians Prop Bets
| BetMGM Bet |
|
|---|---|
Mariners
Guardians
First Team to Score
8/31/25 1:40pm EDT | -155+118Bet |
Mariners
Guardians
Tie
1st Inning Winner
8/31/25 1:40pm EDT | +300+300-140Bet |
Mariners
Guardians
Tie
First 3 Innings Winner
8/31/25 1:40pm EDT | +150+140+275Bet |
Mariners
Guardians
To Extra Innings
8/31/25 1:40pm EDT | Yes +725No -1200Bet |
| BetMGM | |
Mariners
Guardians
1st Team to Score Will Win
8/31/25 1:40pm EDT | Yes -250No +190Bet |
Guardians
Total Runs
SEA at CLE 8/31/25 1:40pm EDT | 3.5 o -1303.5 u +100Bet |
Mariners
Total Runs
SEA at CLE 8/31/25 1:40pm EDT | 4.5 o +1154.5 u -150Bet |
Bryce Miller
Strikeouts Thrown
SEA at CLE 8/31/25 1:40pm EDT | 4.5 o +1154.5 u -150Bet |
| BetMGM | |
Tanner Bibee
Strikeouts Thrown
SEA at CLE 8/31/25 1:40pm EDT | 5.5 o +1205.5 u -155Bet |
Seattle Mariners & Cleveland Guardians Futures Odds
Latest World Series odds, if available, for each team. Review odds for other teams and learn how to bet on the tournament. See past Championship results and learn how to bet World Series teasers, props and parlays.
Seattle Mariners World Series Odds|
Team | BetMGM |
|---|---|
| Mariners | +1000 Bet |
|
Team | BetMGM |
|---|---|
| Guardians | +15000 Bet |
Seattle Mariners & Cleveland Guardians Team Pages
Review each team's season win total odds, futures odds, betting bonuses and other valuable information on our exclusive team betting odds pages. Team betting odds and stats update throughout the season:
Team Standings
| Team | W | L | Pct | GB | Home | Away | RS | RA | Diff | Strk | L10 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Seattle Mariners | 83 | 68 | 0.550 | +9.0 | 48-27 | 35-41 | 717 | 659 | +58 | W10 | 10-0 |
| Cleveland Guardians | 79 | 71 | 0.527 | +12.5 | 41-34 | 38-37 | 587 | 616 | -29 | W5 | 9-1 |
How to Bet on the Game
Time needed: 4 minutes.
How to Bet on the Seattle Mariners vs Cleveland Guardians MLB Game
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Open a new sports betting account before game time.
Review our list of sports betting sites. Open a new account before the game starts on Sunday, August 31st, 2025 at 1:40 pm EDT, making sure to enter all your personal details correctly. Don't forget to add your bonus code.
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Visit the sportsbook’s cashier, banking, or deposit page.
Navigate to the sportsbook's deposit page. Use your Visa card or MasterCard, or deposit with a bank transfer, or other methods like Paypal.
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Tap to the sportsbook's MLB page, look for the Seattle Mariners vs Cleveland Guardians Game.
Navigate to the sportsbook's MLB page. Next, look for live or upcoming matchups. Select the Seattle Mariners vs Cleveland Guardians Game.
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Choose your bet and place a wager.
Choose your bet and then use the funds you deposited to place a wager. The sportsbook will pay your winnings or deduct a losing wager from your account balance after the game.
Other August 31, 2025 MLB Games
- St. Louis Cardinals vs Cincinnati Reds - 8/31/25 12:10pm EDT
- San Diego Padres vs Minnesota Twins - 8/31/25 1:09pm EDT
- Pittsburgh Pirates vs Boston Red Sox - 8/31/25 1:35pm EDT
- Tampa Bay Rays vs Washington Nationals - 8/31/25 1:35pm EDT
- Milwaukee Brewers vs Toronto Blue Jays - 8/31/25 1:37pm EDT
- Miami Marlins vs New York Mets - 8/31/25 1:40pm EDT
- New York Yankees vs Chicago White Sox - 8/31/25 2:10pm EDT
- Los Angeles Angels vs Houston Astros - 8/31/25 2:10pm EDT
- Detroit Tigers vs Kansas City Royals - 8/31/25 2:10pm EDT
- Chicago Cubs vs Colorado Rockies - 8/31/25 3:10pm EDT
- Texas Rangers vs Oakland Athletics - 8/31/25 4:05pm EDT
- Baltimore Orioles vs San Francisco Giants - 8/31/25 4:05pm EDT
- Arizona Diamondbacks vs Los Angeles Dodgers - 8/31/25 4:10pm EDT
- Atlanta Braves vs Philadelphia Phillies - 8/31/25 7:10pm EDT