Boston Red Sox vs Seattle Mariners

MLB

SEA 66-74

8 – 3

Final

BOS 75-65

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Seattle Mariners vs Boston Red Sox: Betting Line, Odds & Head-to-Head Breakdown

MLB · 2026 Season · Odds via DraftKings

This game has ended. The Seattle Mariners defeated the Boston Red Sox, 8-3. You can find the full box score and recap above.

Heading into this MLB matchup, DraftKings lists the Boston Red Sox as the favorite at BOS -149, with the Seattle Mariners sitting as the underdog on the moneyline. The point spread currently sits at -1.5, and the over/under total for the game is set at 8.5, giving an early read on how competitive, and how high-scoring, oddsmakers expect this game to be.

These two teams already know each other well this season. SEA wins series 2-1, across 3 meetings so far. Head-to-head trends like this are often factored into betting lines and predictive models alike, since some matchups simply play out differently than a team's overall record would suggest.

That betting line lines up with what the standings show. The Seattle Mariners currently carry a .471 win percentage on the season, compared to .536 for the Boston Red Sox. Whether that gap on paper translates to the scoreboard is a different question entirely, standings measure a whole season, while a single game can turn on one swing, one drive, or one bad quarter.

Betting lines, like win probabilities, are a snapshot, not a forecast set in stone, and they can shift right up until the Final start time as injury news, weather, and public money move the market. This page will keep reflecting the latest numbers as they update, so it's worth a final check before Seattle Mariners and Boston Red Sox actually take the field.

Odds are for informational purposes only and are subject to change. Please gamble responsibly.

Division Standings

2026 American League West Standings

Team	W	L	PCT	GB	STRK
Houston	70	69	.504	-	L1
Texas	69	71	.493	1.5	L1
Seattle	66	74	.471	4.5	W2
Athletics	54	86	.386	16.5	W1
Los Angeles	53	86	.381	17	L1

2026 American League East Standings

Team	W	L	PCT	GB	STRK
Tampa Bay	83	55	.601	-	W1
New York	79	60	.568	4.5	W1
Boston	75	65	.536	9	L2
Baltimore	69	71	.493	15	L2
Toronto	68	71	.489	15.5	L1

Injured Players

Boston Red Sox

Player	Status	Est. Return
Adley Rutschman C	Day-To-Day	2026-09-03
Johan Oviedo SP	60-Day-IL	2026-09-05
Kutter Crawford SP	60-Day-IL	2026-09-06
Zack Kelly RP	60-Day-IL	2026-09-07
Justin Slaten RP	15-Day-IL	2026-09-10

Seattle Mariners

Player	Status	Est. Return
Brendan Donovan 3B	7-Day IL	2026-09-03
Cole Wilcox RP	15-Day-IL	2026-09-07
Matt Brash RP	60-Day-IL	2026-09-08
Will Wilson 3B	60-Day-IL	2026-09-10
Emerson Hancock SP	15-Day-IL	2026-09-13

Frequently Asked Questions

What channel is the Seattle Mariners vs Boston Red Sox game on?

The MLB matchup between the Seattle Mariners and Boston Red Sox will be broadcast on NESN, and available to stream on MLB.TV, Mariners.TV. Check your local listings, as regional blackouts may apply.

What time does the MLB game start?

The Seattle Mariners take on the Boston Red Sox on Final. Start times are shown in your local time zone and may shift slightly for weather or broadcast scheduling.

Where is the game being played?

This MLB game is being played at Fenway Park in Boston, Massachusetts. You can find venue details, surface type, and live weather conditions in the matchup info section above.

Who is favored to win, Seattle Mariners or Boston Red Sox?

A win-probability prediction for this game isn't available yet. It's typically generated closer to game time.

Is this page safe to use, and does it track my personal data?

Yes. This page only displays public game data, scores, standings, odds, and weather, served over a secure HTTPS connection. It does not request your location, store personal information, or run third-party tracking scripts. You can browse scores and stats without creating an account or sharing any personal data.