MLB · 2026-09-01
Seattle Mariners vs Boston Red Sox
Fenway Park
Seattle Mariners
64-74
VS
Boston Red Sox
75-63
53%
Seattle Mariners win probability · +108
Tale of the tape
53%Win probability47%
0.464Win %0.543
-73Run differential+85
Lean+108 · BetOnline.ag
Seattle Mariners to win
Our model makes Seattle Mariners 53% to win, but the price only implies 48% — that 5-point gap is where the value is.
Our read leans Seattle Mariners over Boston Red Sox — a 53% win probability once everything is weighed. A modest 53% lean — fine as a small play or a parlay leg. Pitching matchup: Jedixson Paez (18.00 ERA) vs Bryan Woo (4.36 ERA).
Why we lean this way
- Form & record: Boston Red Sox sit 75-63 (0.543), Seattle Mariners 64-74 (0.464).
- Last 10: Boston Red Sox 6-4 (W1), Seattle Mariners 4-6 (L5). Hot streaks move these lines fast.
- Run differential: Boston Red Sox +85, Seattle Mariners -73 on the year — the most honest measure of how good a team actually is, beyond their record.
- On the mound: Boston Red Sox hand the ball to Jedixson Paez; Seattle Mariners counter with Bryan Woo. Starting pitching swings a baseball game more than any other factor.
- Home field: worth about +3.5% to Boston Red Sox in our model.
The verdict
Bottom line: Seattle Mariners to win is a slight lean. Treat it like a 53% spot — not a sure thing, because there is no such thing. Size it sensibly and enjoy the game.
Logged to our public track record and graded after the final. We analyze; we never take wagers. 21+.
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