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Home/MLB/Athletics @ Seattle Mariners
MLB · 2026-09-05

Athletics vs Seattle Mariners

T-Mobile Park

Athletics
56-86
VS
Seattle Mariners
66-76
54%
Seattle Mariners win probability · -230
Tale of the tape
46%Win probability54%
0.394Win %0.465
-190Run differential-69
Lean-230 · BetOnline.ag
Seattle Mariners to win
The market (70%) rates this higher than our model (54%) — no real edge, so we pass.

The model lands on Seattle Mariners here, giving them a 54% chance to come out on top against Athletics. A modest 54% lean — fine as a small play or a parlay leg. Pitching matchup: George Kirby (4.19 ERA) vs Jeffrey Springs (6.37 ERA).

Why we lean this way

  • Form & record: Seattle Mariners sit 66-76 (0.465), Athletics 56-86 (0.394).
  • Last 10: Seattle Mariners 3-7 (L2), Athletics 5-5 (W3). Hot streaks move these lines fast.
  • Run differential: Seattle Mariners -69, Athletics -190 on the year — the most honest measure of how good a team actually is, beyond their record.
  • On the mound: Seattle Mariners hand the ball to George Kirby; Athletics counter with Jeffrey Springs. Starting pitching swings a baseball game more than any other factor.
  • Home field: worth about +3.5% to Seattle Mariners in our model.

The verdict

The play we like: Seattle Mariners. It is a slight lean at 54% — good value, not a lock. Bet what is fun to lose.

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

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