Phillies vs Mariners: Betting Preview & Expert Picks-MLB 2025

On Wednesday, August 20, the Philadelphia Phillies (70–55) travel to Seattle to face the Mariners (68–57) at T-Mobile Park in the early evening. Seattle will counter with left-hander George Kirby, while Philadelphia sends ace Aaron Nola to the mound. This matchup features contrasting pitching styles and potential offensive fireworks as both teams aim to strengthen their positions in the AL and NL standings. Get expert insight on pitching matchups, core hitters, and strategy angles for this game.

Match Overview

Detail	Information
Date	Wednesday, 20 August 2025
Time	7:10 PM ET
Venue	T-Mobile Park, Seattle, WA
Teams	Philadelphia Phillies vs. Seattle Mariners
League	Major League Baseball (MLB)

The Philadelphia Phillies will take on the Seattle Mariners at T-Mobile Park on Wednesday, August 20, 2025. The first pitch is scheduled for 7:10 PM ET. With a moneyline of 1.80, the Mariners are the favourites, while the Phillies are the underdogs (2.05). The game’s over/under is set at 9 runs, and Seattle is the run line favourite (-1.5, 2.15).

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Game Odds & Lines

Bet Type	Odds
Moneyline	Philadelphia: 2.05 • Seattle: 1.80
Run Line	Philadelphia +1.5: 1.85 • Seattle -1.5: 2.15
Total Runs (O/U)	Over 9: 1.88 • Under 9: 1.92

Starting Pitchers

Team	Starting Pitcher
Philadelphia Phillies	Aaron Nola (11-5, 3.45 ERA)
Seattle Mariners	George Kirby (10-7, 3.68 ERA)

Weather & Ballpark Conditions

Forecast: Clear skies, 72°F
Wind: Out to right at 6 mph
Humidity: 60%
Ballpark Factor: Slight advantage to hitters due to mild wind conditions

Last 5 Games Record

Team	Last 5 Games
Philadelphia Phillies	W, L, W, W, L
Seattle Mariners	W, W, L, W, W

Head-to-Head Record

Stat	Value
2024 Season Series	Phillies 3 – 4 Mariners
Last 10 Meetings	Mariners lead 6–4

Key Insights & Betting Trends

• Mariners have won four of their last five games at home.
• Phillies struggle on the road, particularly against left-handed pitching.
• Aaron Nola has allowed 2+ runs in three of his last five starts.
• Seattle’s bullpen ranks in the top 12 in ERA for August.
• Mariners have covered the run line in four of their last five home games.

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Expert Picks & Recommended Bets

• Moneyline: Mariners @ 1.80
• Run Line: Mariners -1.5 @ 2.15
• Total Runs: Over 9 @ 1.88

Philadelphia Phillies vs. Seattle Mariners Predicted Outcome

Aaron Nola remains a reliable starter for the Phillies, but George Kirby’s home performance and the Mariners’ hot streak at T-Mobile Park give Seattle the edge. Expect a high-scoring affair with Philadelphia struggling to contain the Mariners’ lineup. A predicted outcome is a 5–3 victory for Seattle, with the total runs likely going over.

Sources: https://www.oddsshark.com/nba/, https://www.cbssports.com/nba, https://www.foxsports.com/articles/nba/, https://www.mybookie.ag/sportsbook/