Seattle Mariners vs Cleveland Guardians Prediction – 8/31/2025
The Seattle Mariners will meet the Cleveland Guardians at Progressive Field for a Sunday matinee that will close out their three-game weekend series. Cleveland has won the first two games of this series at home and will look to secure a sweep with a victory here. But the Mariners are slight favorites in this game that has huge American League playoff implications. Here, I break down this matchup and bring you my Mariners vs Guardians prediction for Sunday.
Our Mariners vs Guardians Pick
- Pick: Guardians Moneyline
- Confidence: 3/5
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Game Snapshot
- Matchup: Seattle Mariners vs Cleveland Guardians
- Date & Time: Sunday, August 31, 2025, 1:40 PM Eastern
- Starting Pitchers: Bryce Miller vs Tanner Bibee
- Stadium: Progressive Field, Cleveland, OH
- Broadcast: MLB.tv
Key Storylines
Pitching Matchup
Seattle’s Bryce Miller has a 3-5 record and a 5.98 ERA so far this season. He is allowing over a hit per inning and has given up 10 home runs in 58.2 innings of work coming into this Sunday start. Tanner Bibee is 9-10 on the season and has a 4.73 ERA. Bibee has not been great this season by any means. But he has been better than Miller over a larger sample size and the Guardians should have the advantage on the mound today.
Playoff Race
Both of these teams are in the heat of the playoff race in the American League. The Mariners are three games back of first place in the AL West and they occupy the third Wild Card spot going into Sunday’s games. The Guardians are three games back of Seattle in the Wild Card standings and a win would be huge for the Guardians today.
Recent Team Streaks
- The Guardians have won four games in a row going into this series finale with Seattle.
- The Mariners have dropped two games in a row and three of their last four.
Best Player Props
| Player | Prop |
|---|---|
| Cal Raleigh | Over 0.5 Home Runs |
| Julio Rodríguez | Under 1.5 Total Bases |
| Tanner Bibee | Over 5.5 Strikeouts |
Betting Trends & H2H
- Seattle leads the season series with the Guardians by a 3-2 margin.
- The home team has won all five games played between these teams this season.
- This is the final game of the regular season series between these teams for the year.
Mariners vs Guardians Model Projection
Score Projection: Seattle 4 – Cleveland 5
Win Probability: Seattle 46%, Cleveland 54%
Final Thoughts
I am going to take the Cleveland Guardians to get a win today and to complete a three-game sweep of the Seattle Mariners. Home-field advantage has been very significant in the season series between these teams so far. We should see that trend continue in this game as the Guardians’ starting pitching advantage should give them the inside track to a victory against a Mariners team that has picked a bad time to play some of its worst baseball of the year.
