The Seattle Mariners will host the Colorado Rockies on Wednesday night at T-Mobile Park. Seattle is red-hot coming into this game and is closing in on a division title. They will try to move closer to achieving that goal with a win in a game where they are heavily favored. Before first pitch from the Pacific Northwest, continue reading to get my Rockies vs Mariners prediction.
Our Rockies vs Mariners Pick
- Pick: Seattle Mariners -1.5
- Confidence: 3/5
Game Snapshot
- Matchup: Colorado Rockies @ Seattle Mariners
- Date & Time: Wednesday, September 24, 2025, 9:40 PM ET
- Starting Pitchers: Tanner Gordon (Rockies) vs Luis Castillo (Mariners)
- Stadium: T-Mobile Park, Seattle, WA
- Broadcast: ROOT Sports NW & Rockies.TV
Key Storylines
Pitching matchup
Luis Castillo takes the mound for Seattle with a 10-8 record and a 3.63 ERA over 173.1 innings. He has shown a solid strikeout rate with 152 strikeouts and a WHIP of 1.23. Castillo is one of the main reasons that the Mariners are so heavily favored in this matchup given his long career of shutting down opposing hitters.
Colorado counters with Tanner Gordon in this game. Gordon is 6-7 with a 6.00 ERA and has struggled mightily this season. His WHIP is inflated at 1.46 and he has been very hittable both at Coors Field and on the road. Seattle’s offense should be able to exploit Gordon’s inconsistencies.
Recent team streaks
- Seattle comes in riding a major hot streak. They have won 15 of their last 16 games and clinched a playoff berth with their last win.
- The Rockies are one of the worst teams in the league, with a 43–114 record. They have lost two of their last three games entering tonight.
Best Player Props
| Player | Stat | Projection Range |
|---|---|---|
| Cal Raleigh (SEA) | Home Runs | Over 0.5 |
| Julio Rodríguez (SEA) | Total Bases | Over 1.5 |
| Hunter Goodman (COL) | Home Runs | Over 0.5 |
| Luis Castillo (SEA) | Strikeouts | Over 6.5 |
Betting Trends & H2H
- The Mariners have won the only game played by these teams this season.
- The first game of this series stayed under the total. There were seven total runs scored and the total was set at 8.5.
- Colorado is 18-58 on the road this season.
- Seattle is 49-27 at home in 2025.
Rockies vs Mariners Model Projection
Score Projection: Rockies 2 – Mariners 7
Win Probability: Rockies 20%, Mariners 80%
Final Thoughts
I expect the Mariners to win in blowout fashion at home on Wednesday night. Their starting pitching edge is huge, the bullpen advantage lies clearly with the Mariners, and the Mariners are playing some of the best baseball in the league right now. I’ll take the Mariners to win and cover the runline. Same Game Parlay enthusiasts should consider pairing the Mariners runline with Cal Raleigh to hit another home run.
