Game Preview — Seattle Mariners vs. Baltimore Orioles August 12, 2025
Overview & Context
On Tuesday, August 12, 2025, the Seattle Mariners (66‑53) will visit the Baltimore Orioles (53‑65) for the opening game of a three‑game series at Oriole Park at Camden Yards, with first pitch scheduled at 6:35 p.m. ET
Starting Pitchers
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Seattle Mariners: RHP George Kirby, currently 7–5 with a 4.04 ERA, seeks to rebound from a tough outing in his last visit to Baltimore, where he surrendered two homers and five runs .
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Baltimore Orioles: RHP Dean Kremer, at 8–8 with a 4.35 ERA, comes in with comfort handling deep outings—four of his last five starts have gone six innings or more, and he maintains a solid 3.77 ERA over that stretch
Team Form & Trends
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Mariners: On a hot streak, having won 9 of their last 10 games and riding the momentum of a seven-game winning streak. Cal Raleigh leads the team’s offense, nearing his 99th RBI of the season . Their overall record, 66–53, positions them strongly for a postseason push .
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Orioles: In contrast, they have struggled this season. Sitting at 53–65, they’re at the bottom of the AL East and have managed just three wins in their last ten games Baltimore’s home record hovers around .500 (approximately 28–29), offering little solace .
Betting Lines & Predictions
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Consensus Odds: Across sportsbooks, Seattle is the clear favorite:
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Moneyline: Mariners around –165; Orioles +138 to +143 .
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Run line: Mariners favored by –1.5 runs (around +100 to –120)
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Over/Under (Total Runs): Generally set between 9 to 9.5 runs .
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Predicted Probability: Based on a moneyline of –150, Seattle’s implied win probability is about 60% .
Tactical Matchups & Key Players
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Seattle’s Strengths: Steady rotation anchored by Kirby, a red-hot offense powered by Cal Raleigh, Julio Rodríguez, JP Crawford, and Randy Arozarena, and deep momentum into this matchup.
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Baltimore’s Variables: Kremer’s reliability contrasts sharply with the Orioles' lackluster offense. Gunnar Henderson and Cedric Mullins—both key offensive figures—are worth noting. Henderson continues to be a promising two-way threat, while Mullins recently achieved a career milestone: 100 home runs and 100 stolen bases, joining elite company in Orioles history .
Watch Information
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Broadcast: Available on MASN and ROOT Sports NW, with streaming options through Fubo ﹘ though subject to blackout and subscription parameters
Summary Table
| Category | Details |
|---|---|
| Date & Time | August 12, 2025, 6:35 p.m. ET |
| Location | Oriole Park at Camden Yards, Baltimore |
| Pitching Matchup | SEA: George Kirby (7–5, 4.04 ERA) vs. BAL: Dean Kremer (8–8, 4.35 ERA) |
| Team Momentum | Mariners: 9–1 in last 10; Orioles: 3–7 in last 10 |
| Betting Lines | Mariners ~ –165 ML; Orioles ~ +138 to +143 ML; O/U around 9–9.5 |
| Key Players | Seattle: Cal Raleigh, Julio Rodríguez, JP Crawford, Arozarena; Baltimore: Dean Kremer, Gunnar Henderson, Cedric Mullins |
| TV / Stream | MASN, ROOT Sports NW, Fubo |
Final Thoughts
The Mariners head into this matchup with both form and roster health on their side, poised to extend their winning run against an Orioles team that’s shown little consistency. Seattle’s offense—bolstered by standout contributors—meets Baltimore’s uneven batting order. While Kremer may keep it close early, the betting markets and recent performance data lean heavily toward a Seattle victory, likely by more than a run.
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