Phillies vs Mariners is an interleague MLB matchup between the Philadelphia Phillies of the National League and the Seattle Mariners of the American League.
The matchup has become especially interesting this week because the Phillies entered their three-game series in Seattle on a nine-game winning streak, while the Mariners were trying to keep their playoff hopes alive. The teams are meeting at T-Mobile Park in Seattle from August 24–26, 2026.
The latest game, played on August 25, 2026, produced a major upset. Seattle defeated Philadelphia 9–2, with Cal Raleigh hitting three home runs and the Mariners ending the Phillies’ nine-game winning streak.
Here is everything you need to know about Phillies vs Mariners.
Phillies vs Mariners at a Glance
| Category | Philadelphia Phillies | Seattle Mariners |
|---|---|---|
| League | National League | American League |
| Division | NL East | AL West |
| Home stadium | Citizens Bank Park | T-Mobile Park |
| Latest meeting | Lost 2–9 | Won 9–2 |
| Latest series | August 24–26, 2026 | August 24–26, 2026 |
| 2026 record entering series | 69–58 | 59–67 |
| Manager | Don Mattingly | Dan Wilson |
| Key star | Bryce Harper | Julio Rodríguez |
| Major power hitter | Kyle Schwarber | Cal Raleigh |
The teams entered the series heading in different directions. Philadelphia was riding a nine-game winning streak, while Seattle had gone 3–7 over its previous 10 games entering the series.
What Is Phillies vs Mariners?
Phillies vs Mariners is an interleague baseball matchup between two teams from different MLB leagues.
The Phillies play in the National League East, alongside teams such as the New York Mets, Atlanta Braves, Miami Marlins and Washington Nationals.
The Mariners play in the American League West, alongside teams such as the Houston Astros, Texas Rangers, Los Angeles Angels and Oakland Athletics.
Because they are in different leagues, the Phillies and Mariners do not play each other as frequently as divisional rivals.
That makes their meetings more unusual and often more interesting for baseball fans.
Phillies vs Mariners: Latest Score
The latest Phillies-Mariners game was played on August 25, 2026, at T-Mobile Park.
Seattle Mariners 9, Philadelphia Phillies 2
Seattle dominated the game from the opening inning.
The Mariners scored five runs in the first inning, including home runs by Julio Rodríguez and Cal Raleigh.
Raleigh then added another home run later in the game and eventually finished with three home runs, the first three-homer game of his career.
For Philadelphia, J.T. Realmuto hit a solo home run, but the Phillies could not generate enough offense to respond.
The defeat ended Philadelphia’s nine-game winning streak.
Cal Raleigh’s Historic Performance
The biggest story from the latest Phillies vs Mariners game was Cal Raleigh.
The Seattle catcher hit three home runs in the 9–2 victory.
It was the first three-home-run game of Raleigh’s career and made him the first Mariners player to hit three homers in a game at T-Mobile Park since the venue opened.
Raleigh’s performance was particularly notable because he had been struggling offensively during the 2026 season.
One huge game therefore arrived at exactly the right time for Seattle.
Julio Rodríguez Also Homered
Raleigh was not the only Mariners star to make an impact.
Julio Rodríguez hit a three-run home run in the first inning.
That blast helped Seattle immediately establish control of the game.
The Mariners scored five runs in the opening inning and never surrendered the advantage.
The combination of Rodríguez’s early power and Raleigh’s three-homer performance made the game extremely difficult for Philadelphia to recover from.
What Happened to Zack Wheeler?
Philadelphia starter Zack Wheeler had a difficult night.
He allowed eight runs on nine hits in just over four innings, including four home runs.
The outing also resulted in his fourth consecutive loss.
His ERA jumped from 2.92 to 3.40 following the performance.
For a Phillies team that relies heavily on its pitching, Wheeler’s struggles were one of the most important developments of the game.
How Did the Phillies Enter the Series?
Philadelphia arrived in Seattle playing some of its best baseball of the season.
The Phillies had won nine consecutive games before facing the Mariners.
They had recently beaten the St. Louis Cardinals in a dramatic comeback, winning 6–4 after Kyle Schwarber hit a walk-off home run.
The winning streak had moved Philadelphia into a strong position in the National League playoff race.
That made the loss to Seattle particularly surprising.
How Were the Mariners Doing?
Seattle entered the series in a much more difficult position.
The Mariners were 59–67 entering the August 24 game and had lost seven of their previous 10 games.
However, they remained within reach of the American League playoff picture.
That meant the Phillies series represented an important opportunity.
Beating a National League contender could give Seattle valuable momentum at a crucial point of the season.
The Mariners took advantage in Game 2.
Phillies vs Mariners Head-to-Head Record
The Phillies and Mariners have not played each other particularly often.
Before the 2026 series, the teams had played 28 regular-season games since interleague play began, with each team winning 14 games.
That means the all-time regular-season matchup was completely even entering 2026.
Head-to-head before 2026
- Phillies wins: 14
- Mariners wins: 14
- Games: 28
The latest Seattle victory gives the Mariners the advantage in the 2026 series so far.
Recent Phillies vs Mariners Results
Some of the most recent meetings include:
August 25, 2026
Mariners 9–2 Phillies
Cal Raleigh hit three home runs.
August 24, 2026
The Phillies and Mariners opened their three-game series at T-Mobile Park.
August 20, 2025
Phillies 11–2 Mariners
August 19, 2025
Phillies 6–4 Mariners
August 18, 2025
Phillies 12–7 Mariners
Philadelphia swept Seattle in their 2025 three-game series at Citizens Bank Park.
That makes Seattle’s 2026 victory particularly interesting because the Mariners entered the series looking to reverse the recent trend.
Where Are the Phillies and Mariners Playing?
The 2026 series is being played at T-Mobile Park, the home of the Seattle Mariners.
The schedule is:
| Date | Matchup | Location |
|---|---|---|
| August 24, 2026 | Phillies at Mariners | T-Mobile Park |
| August 25, 2026 | Phillies at Mariners | T-Mobile Park |
| August 26, 2026 | Phillies at Mariners | T-Mobile Park |
The third game is scheduled for 4:10 p.m. ET on August 26.
Phillies vs Mariners: Key Players to Watch
Bryce Harper
Bryce Harper remains one of Philadelphia’s biggest offensive threats.
His ability to get on base and provide power makes him one of the most important players in the Phillies lineup.
Even when the Phillies are struggling, Harper can change a game with one swing.
He also extended his on-base streak to 27 games entering the August 25 matchup.
Kyle Schwarber
Kyle Schwarber is another major source of power for Philadelphia.
He entered the Mariners series with 39 home runs and 78 RBIs, according to the current matchup statistics. (FOX Sports)
His ability to hit home runs makes him especially dangerous in a hitter-friendly situation.
J.T. Realmuto
Realmuto provided Philadelphia’s only home run in the August 25 loss.
He hit a solo shot to give the Phillies one of their few offensive highlights of the night.
His contributions behind the plate and at the plate make him an important part of Philadelphia’s roster.
Julio Rodríguez
For Seattle, Julio Rodríguez is one of the most recognizable stars.
His three-run home run in the first inning of the August 25 game immediately changed the contest.
When Rodríguez is producing power and getting on base, Seattle’s lineup becomes considerably more dangerous.
Cal Raleigh
Raleigh was the undisputed star of the latest game.
His three home runs gave him a career-high performance and helped Seattle produce one of its most impressive wins of the season.
His performance could also be an important confidence boost after a difficult stretch offensively.
Phillies vs Mariners: Pitching Matchup
Pitching is particularly important when these two teams meet because both clubs have quality arms.
Philadelphia entered the series with Zack Wheeler, Aaron Nola and Jesús Luzardo lined up as its starters.
Seattle planned to counter with pitchers including Logan Gilbert and George Kirby.
The latest game demonstrated how quickly the pitching matchup can change the outcome.
Wheeler entered the game as one of Philadelphia’s most trusted pitchers but struggled badly against Seattle.
Logan Gilbert, meanwhile, allowed Seattle to establish control and eventually earned the victory.
Phillies vs Mariners: Which Team Is Better?
Based on the 2026 season entering this series, Philadelphia has been the stronger team.
The Phillies entered the matchup at 69–58, while Seattle was 59–67.
Philadelphia was also riding a nine-game winning streak.
However, baseball is not decided by season records alone.
The Mariners demonstrated that on August 25.
They overwhelmed Philadelphia 9–2 and produced one of their best offensive performances of the season.
Why Is Phillies vs Mariners Important?
The series matters for both teams for different reasons.
For Philadelphia
The Phillies are trying to maintain their position in the National League playoff race.
They also want to regain momentum after their winning streak ended.
For Seattle
The Mariners are fighting to stay relevant in the American League playoff race.
A strong performance against Philadelphia could provide a much-needed boost.
For both teams
Interleague games are valuable because they can affect playoff positioning without being against a divisional opponent.
Phillies vs Mariners: Biggest Storylines
Several storylines make this series worth following.
1. Can Philadelphia bounce back?
The Phillies had won nine straight before Seattle ended the streak.
2. Is Cal Raleigh back?
Three home runs could be the start of a major turnaround.
3. Can Seattle make a playoff push?
The Mariners still need wins to remain in contention.
4. Can Philadelphia’s pitching recover?
Wheeler’s poor outing was a major concern.
5. Which offense will produce?
Both teams have legitimate power hitters capable of changing a game quickly.
Phillies vs Mariners: Frequently Asked Questions
When do the Phillies play the Mariners?
The teams are playing a three-game series in Seattle from August 24 through August 26, 2026.
Who won Phillies vs Mariners?
The Seattle Mariners defeated the Philadelphia Phillies 9–2 on August 25, 2026. (ESPN)
Who hit three home runs for the Mariners?
Cal Raleigh hit three home runs in the August 25 victory.
Who hit the Phillies’ home run?
J.T. Realmuto hit a solo home run for Philadelphia.
Did the Mariners end the Phillies’ winning streak?
Yes. Seattle’s 9–2 victory ended Philadelphia’s nine-game winning streak.
How many times have the Phillies and Mariners played?
They had played 28 regular-season games through 2025, with each team winning 14.
Who has won more Phillies vs Mariners games?
Entering the 2026 meetings, neither team had the historical advantage. The regular-season record was 14–14. (Sports Reference)
Where do the Mariners play?
The Seattle Mariners play their home games at T-Mobile Park in Seattle, Washington.
Where do the Phillies play?
The Philadelphia Phillies play their home games at Citizens Bank Park in Philadelphia, Pennsylvania.
Final Thoughts
Phillies vs Mariners is an interleague matchup that does not happen often, but the 2026 series has already produced a major storyline.
Philadelphia entered Seattle riding a nine-game winning streak and looking like one of the National League’s hottest teams. Seattle, meanwhile, needed victories to stay in the American League playoff picture.
Then came Game 2.
The Mariners exploded offensively, scoring nine runs and hitting five home runs. Cal Raleigh hit three homers, Julio Rodríguez added a three-run shot, and Seattle ended the Phillies’ winning streak with a convincing 9–2 victory.
The result is a reminder that even a team struggling for consistency can completely change the story with one outstanding game.
With one game remaining in the series, the Phillies vs Mariners matchup still has plenty to offer—especially as both teams continue their respective pushes toward the postseason.
