Philadelphia Phillies vs Seattle Mariners Prediction 8/25/2026 Today’s MLB Picks

In this article, we will formulate a Phillies vs Mariners Prediction for this MLB matchup on Tuesday, August 25th in the second game of this series. Let’s take a look at the prediction for this MLB matchup.

Seattle Mariners Preview

The Seattle Mariners have a 63-69 record this season and sit in 3rd place in the AL West. They have a 36-30 home record and are coming off a 9-2 home win against the Phillies. They will face the Blue Jays and the Red Sox next.

The Seattle Mariners have a .229 batting average this season, .309 OBP, and .375 Slugging percentage. Seattle’s pitching staff has a 4.12 ERA and 1.24 WHIP. Randy Arozarena is the Mariners’ best hitter with a .274 batting average, while leading the team in RBI with 58, also adding a team-high 20 home runs.

George Kirby (R) is the projected starting pitcher for the Mariners, holding an 8-10 record, 4.18 ERA, and 1.36 WHIP.

Philadelphia Phillies Preview

The Philadelphia Phillies have a 73-59 record this season and sit in 2nd place in the NL East. They have a 35-29 road record and are coming off a 2-9 road loss against the Mariners. They will face the Angels and the Diamondbacks next.

The Philadelphia Phillies have a .243 batting average this season, .314 OBP, and .404 Slugging percentage. Philadelphia’s pitching staff has a 4.11 ERA and 1.30 WHIP. Brandon Marsh is the Phillies’ best hitter with a .274 batting average. Kyle Schwarber leads the team in RBI with 78, also adding a team-high 39 home runs.

Aaron Nola (R) is the projected starting pitcher for the Phillies, holding a 5-9 record, 5.12 ERA, and 1.42 WHIP.

Philadelphia Phillies @ Seattle Mariners Betting Trends: August 25, 2026

• Probable Starting Pitcher: George Kirby      Record this season: 8-10      ERA: 4.18
• Home Record: 5-4
• Last 5 against Phillies: 0-1

Why the Seattle Mariners will win

• The home team has won each of the Phillies’ last seven games.
• The Phillies have lost each of their last eight games as road underdogs against AL West opponents following a loss.
• The home team has covered the run line in each of the last four games between the Phillies and Mariners.
• The Phillies have failed to cover the run line in five of their last six games against AL West opponents that held a losing record.
• The Mariners have won the first inning in four of their last five home games.
• The Phillies have trailed after 5 innings in each of their last four games against AL West opponents that held a losing record.
• The Mariners have led after 3 innings in each of their last four games as favorites.

• Probable Starting Pitcher: Aaron Nola      Record this season: 5-9      ERA: 5.12
• Road Record: 4-5
• Last 5 against Mariners: 1-1

Why the Philadelphia Phillies will win

• The Mariners have lost four of their last five games as favorites against NL East opponents.
• The Phillies have won nine of their last 10 games.
• The Mariners have failed to cover the run line in 15 of their last 16 games as favorites.
• The Phillies have covered the run line in eight of their last nine games as road underdogs against AL West opponents.
• The Phillies have won the first inning in four of their last five night games against AL West opponents that held a losing record.
• The Phillies have led after 5 innings in each of their last six Tuesday games against AL opponents that held a losing record.
• The Phillies have led after 3 innings in each of their last six Tuesday games against AL opponents that held a losing record.

Total Runs Facts

• Each of the Mariners’ last seven games have gone OVER the total runs line.
• Each of the Phillies’ last six games against AL West opponents have gone OVER the total runs line.
• There has been at least one run scored in the first inning in each of the Mariners’ last 10 games.
• There has been at least one run scored in the first inning in each of the Phillies’ last six games as underdogs.

Seattle Mariners Player Prop Facts

• Julio Rodriguez has hit a home run in each of the Mariners’ last two games against the Phillies.
• George Kirby has recorded five or more strikeouts in each of his last four appearances with the Mariners as favorites against NL opponents.
• Josh Naylor has recorded at least one hit in each of the Mariners’ last 11 night games against NL opponents that held a winning record.

Philadelphia Phillies Player Prop Facts

• J.T. Realmuto has hit a home run in three of the Phillies’ last four games against the Mariners.
• Aaron Nola has recorded six or more strikeouts in each of his last 11 appearances in night games against AL teams that held a losing record.
• Bryce Harper has recorded at least one hit in each of his last 10 appearances against the Mariners after playing the previous day.
• Luis Arraez ranks 1st in the league in Hits (160) this season.

Matchup/League Facts

• The Mariners rank 30th in the league for doubles this season (158).
• The Mariners rank 29th in the league for runs scored this season (522).
• The Phillies rank 1st in the league for strikeouts this season (1302).
• The Phillies are one of only three teams in the league to rank top 10 in both strikeouts and walks allowed this season.

Phillies vs Mariners Prediction

The Phillies are 4-1 in their last 5 meetings against the Mariners but are 1-3 in their last 4 meetings in Seattle.

In this Phillies vs Mariners Prediction, the Mariners are coming as -110 home favorites. I like the over in this one. Yesterday was supposed to be a pitcher’s duel and the total was set at just 6.5 runs and there were 11 runs scored with Gilbert and Wheeler on the mound, so I expect another high-scoring affair with Nola and Kirby. The Mariners’ bullpen has been in terrible form and both offenses have been red-hot, averaging 13.3 runs per game combined against righties in their last 10 games respectively and 12.2 runs per game overall. Take the over 7.5 in this one.  

Nikos Lagouretos's Pick: Over 7.5