The Seattle Mariners head to Fenway Park to face the Boston Red Sox on September 1, 2026. First pitch is set for 6:45 p.m. ET. Here’s everything you need to know: where to watch, how both teams are doing, and who’s starting.
| Matchup | Seattle Mariners vs. Boston Red Sox |
| League | MLB |
| Date | September 1, 2026 |
| First Pitch | 6:45 p.m. ET · 4:45 p.m. Mexico City · 6:45 p.m. Caracas · 6:45 p.m. Santo Domingo |
| Venue | Fenway Park, Boston |
Where to Watch
🇺🇸 United States (English)
- Seattle Mariners local: Mariners.TV · KING 5 (over-the-air) · MLB app (in-market, no local blackout)
- Boston Red Sox local: NESN · NESN 360 streaming
🇺🇸 United States (Spanish)
- Telemundo — Carried the Opening Day broadcast; 25 featured games in 2026 via Telemundo Deportes
- UniMás / TUDN — MLB En Vivo (Tuesdays 9 p.m. ET) and MLB Esta Semana (Saturdays 3 p.m. ET)
- Universo — Sunday Night Baseball in Spanish
- FOX Deportes — Regular season + Spanish simulcast of FOX postseason (Division Series, Championship Series, World Series)
- ESPN Deportes — ESPN’s 30-game linear package in Spanish
- Peacock — Sunday Night Baseball in Spanish
🇲🇽 Mexico — 4:45 p.m. CT
- Canal 5 — 55 regular-season games; deal runs 2026–2028
- NU9VE (Canal 9) — Sunday game of the week
- ESPN — ~6 games per week
- TUDN
- Canal FOX — 5-game weekly package: Tuesdays, Thursdays, Fridays and two Saturdays
- Disney+ — 6 additional games per week + ESPN simulcast
🇻🇪 Venezuela — 6:45 p.m.
- Televén (free) — Mainly weekends; free streaming on their mobile app
- 1BASEBALL — 24/7 baseball channel, up to 3 games per day; available via Simple, Inter and NetUno GO
- ByM Sport — 6 days a week via Inter and Simple
- IVC — Tuesday through Sunday
- ESPN / Disney+ — Live and replay
🇩🇴 Dominican Republic — 6:45 p.m.
- Teleantillas Canal 10 (free) — 7 games per week, one per day, free to air. Now in its seventh consecutive year. Coverage runs from Opening Day through the full World Series, including the Futures Game, Home Run Derby, All-Star Game and entire postseason
- ESPN
- 1BASEBALL — via Altice
- FOX / FS1 / FS2 / FOX Deportes
- teleantillas.com.do (free streaming)
- MLB.TV
🇵🇷 Puerto Rico — 6:45 p.m.
- WAPA Deportes (free) — Regular season, typically Fridays, Saturdays and Sundays. Exclusive island broadcast of the All-Star Game and Home Run Derby
- MLB.TV
A note on MLB.TV: MLB.TV remains an out-of-market product. For 22 of 30 clubs, a separate in-market local subscription is available inside the MLB app (~$19.99/month or ~$99.99/season), and it is free of local blackouts. Games that air exclusively on national partners (Netflix, NBC/Peacock, Apple TV, FOX, ESPN) are not included in MLB.TV — that’s a rights issue, not a blackout. No public blackout map exists for Latin American countries, so availability may vary.
How Both Teams Are Doing
- Seattle Mariners: 64-74 (.464)
- Boston Red Sox: 75-63 (.543)
Boston arrives in playoff-contention mode — every September win matters as the Red Sox work to lock down a postseason spot. Seattle, meanwhile, is already out of the race and playing for pride and development the rest of the way.
Starting Pitchers
- Seattle Mariners — Bryan Woo (RHP): 9-9, 4.36 ERA, 1.10 WHIP, 142 strikeouts in 142.1 innings
- Boston Red Sox: Starter to be announced
Woo has been solid in terms of missing bats — 142 strikeouts is nothing to dismiss — but his 1.10 WHIP signals he’s been putting runners on base at a notable rate. Boston’s lineup will be looking to capitalize on any mistake, especially with the playoff stakes in play.
This article will be updated after the final out with the score, key plays and video highlights.
