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Home/MLB/San Francisco Giants @ Boston Red Sox
MLB · 2026-08-21

San Francisco Giants vs Boston Red Sox

Fenway Park

San Francisco Giants
52-75
VS
Boston Red Sox
68-59
52%
Boston Red Sox win probability · -168
Tale of the tape
48%Win probability52%
0.409Win %0.535
-76Run differential+95
Toss-up-168 · FanDuel
Boston Red Sox to win
The market (63%) rates this higher than our model (52%) — no real edge, so we pass.

Boston Red Sox grade out as the side to be on versus San Francisco Giants, at 52% to win. Essentially a coin flip at 52% — entertainment only, not a spot to press. Pitching matchup: Sonny Gray (2.65 ERA) vs Logan Webb (3.50 ERA).

Why we lean this way

  • Form & record: Boston Red Sox sit 68-59 (0.535), San Francisco Giants 52-75 (0.409).
  • Last 10: Boston Red Sox 4-6 (L1), San Francisco Giants 3-7 (L1). Hot streaks move these lines fast.
  • Run differential: Boston Red Sox +95, San Francisco Giants -76 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 Sonny Gray; San Francisco Giants counter with Logan Webb. 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

Where we land: Boston Red Sox, a near coin-flip. A 52% edge is worth backing, but variance is real — keep stakes reasonable.

Logged to our public track record and graded after the final. We analyze; we never take wagers. 21+.

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