The Seattle Mariners will host the Colorado Rockies on Tuesday night at T-Mobile Park in Seattle. The Mariners are red-hot down the stretch and they have taken the lead in the AL West. They will try to move closer to clinching the division title with a victory at home against the worst team in baseball tonight. Before this interleague matchup from Seattle begins, you can continue reading to get my Rockies vs Mariners prediction for Tuesday’s showdown.
Our Rockies vs Mariners Pick
- Pick: Seattle Mariners -1.5
- Confidence: ★★★★☆
Game Snapshot
- Matchup: Colorado Rockies vs Seattle Mariners
- Date & Time: Tuesday, September 23, 2025, 9:40 PM ET
- Starting Pitchers: McCade Brown (COL) vs Bryce Miller (SEA)
- Stadium: T-Mobile Park, Seattle, WA
- Broadcast: MLB.tv
Key Storylines
- Pitching matchup: Colorado sends out McCade Brown, who has had a very rough season. He has an 0-4 record and a 9.17 ERA over 17.2 innings. Seattle will go with Bryce Miller, who is 4-5 with a 5.58 ERA. While Miller has been inconsistent, the gap between the two starters in this game is large. The Rockies’ pitching staff remains among the worst in MLB in aggregate, both with their starting pitching and from the bullpen.
- Key Players:
- Seattle’s Cal Raleigh has been incredible this season and is leading the team in home runs with 58 and RBI with 121. He has become the top choice for American League MVP and could be dangerous against inferior pitching. Julio Rodríguez also remains a bat to fear for Seattle.
- Hunter Goodman is the main offensive weapon for the Rockies. He’s got 30 home runs and leads the team in hits and RBI. He is surrounded by hitters who have struggled to hit for average or power and Goodman will likely need to have a big game for Colorado to have any chance to pull off an upset here.
- Recent team streaks: The Mariners have won four games in a row coming into this series. They just swept the Astros on the road to take a three-game lead in the AL West in the final week of the season. Colorado won two out of three games against the Los Angeles Angels in their last series and they will try to beat another AL West team here.
Best Player Props
| Player | Stat | Pick |
|---|---|---|
| Cal Raleigh (SEA) | Home Runs | Over 0.5 |
| Julio Rodríguez (SEA) | Total Bases | Over 1.5 |
| Hunter Goodman (COL) | RBI | Over 0.5 |
| Bryce Miller (SEA) | Strikeouts | Over 5.5 |
Betting Trends & H2H
- This is the first meeting between the Mariners and Rockies this season.
- Colorado is a miserable 18-57 on the road for the season.
- Seattle is 48-27 at home this year.
Rockies vs Mariners Model Projection
- Score Projection: Colorado Rockies 2 – Seattle Mariners 7
- Win Probability: Colorado Rockies 30%, Seattle Mariners 70%
Final Thoughts
Seattle enters this game with a ton of advantages over the Rockies. Seattle has the superior offense, much better depth, and home-field advantage. Even though Bryce Miller has had some shaky outings, he should suffice against a Colorado team that has limited ability to capitalize on his mistakes. I will lay the runline with the Mariners in this contest from the Pacific Northwest.
