How to Watch Mariners at Red Sox
Fenway Park · Boston, MA · Tuesday, September 1, 2026. Here's first pitch, the TV channel and the live stream.
▶ Watch on NESN- GameMariners at Red Sox
- AwaySeattle Mariners
- HomeBoston Red Sox
- DateTuesday, September 1, 2026
- First pitch6:45 PM ET (your local time on the live schedule)
- BallparkFenway Park, Boston, MA (a 37,755-seat grass ballpark)
- Watch onNESN (Red Sox market) or Mariners.TV (Mariners market) ↗
How to watch Seattle Mariners at Boston Red Sox
Mariners at Red Sox — Seattle Mariners visiting Boston Red Sox at Fenway Park in Boston, MA — is set for Tuesday, September 1, 2026, with first pitch around 6:45 PM ET. The game airs in-market on NESN. National carriers don't have this one.
On TV: this is an in-market game — it airs on NESN (Red Sox market) or Mariners.TV (Mariners market) from about 6:45 PM ET, not on a national channel.
Streaming: in-market via NESN (Red Sox market) or Mariners.TV (Mariners market) or a live-TV package that carries it; out of market on MLB.TV.
Tap Watch on NESN to go straight to the broadcast. For the full week of baseball across every club — with times auto-converted to your local zone — see the complete schedule or today's watch guide.
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About Fenway Park
Fenway Park in Boston, Massachusetts opened on April 20, 1912, and is the oldest ballpark still in use in Major League Baseball. Its left-field wall, the Green Monster, stands about 37 feet tall and carries a manually operated scoreboard.
The Red Sox clinched the 2013 World Series at home in Fenway Park.
Frequently asked questions
What time does Mariners at Red Sox start?
First pitch is scheduled for 6:45 PM ET on Tuesday, September 1, 2026. Times are US Eastern — the live schedule at BaseballOnTV.net converts them to your local zone.
What channel is the Red Sox game on tonight?
There's no national broadcast of this one — it's an in-market game. Watch it on NESN (Red Sox market) or Mariners.TV (Mariners market). Outside those markets it's an out-of-market game on MLB.TV.
How can I stream Mariners at Red Sox live?
In-market, stream it through NESN (Red Sox market) or Mariners.TV (Mariners market) or a live-TV service that carries it. Out of market, it streams on MLB.TV.
Where is Mariners at Red Sox being played?
At Fenway Park in Boston, MA, a 37,755-seat grass ballpark.
Is Mariners at Red Sox blacked out on MLB.TV?
MLB.TV is an out-of-market product: live out-of-market regular-season games are included, but games are blacked out in each club's home television territory, where they air on that club's in-market channel or stream instead. Nationally exclusive games (for example FOX Saturday games) are also blacked out on MLB.TV. Audio for all 30 clubs is blackout-free. As of 2026, ESPN sells and distributes MLB.TV, and it is also available through MLB's own platforms.
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