Author: Vladislav Musilek   

Mariners @ Yankees: How We Read the Run Line (+1.5)

MLB · Match Analysis

How we read it: Yankees +1.5 vs Seattle

Seattle Mariners @ New York Yankees · Woo vs Weathers

12 August 2026, 01:05 CEST · Analysed by OPTIMUS II v1.6

The read MLB · Run line
New York Yankees +1.5 @ 1.442
1.00Unit
1.442Odds
77.65%Model prob.
+12.01%Model EV

Note: this analysis is published for the archive after the game. It shows how our model read the matchup — it is not a live recommendation.

The stronger side, with a cushion

The strongest value here was not tied to the Yankees winning outright. The +1.5 handicap also covers a one-run defeat — letting us respect Bryan Woo’s quality while backing the stronger overall profile of the home team. And on the season-long numbers, that gap was clear.

Yankees
Season
Mariners
66–52
Record
56–63
531
Runs scored
462
167
Home runs
137
3.30
Staff ERA (MLB-best)
3.13
Bullpen ERA
3.78

Seattle’s platoon problem

The Mariners’ matchup against left-hander Ryan Weathers was the key. Seattle ranked near the very bottom of MLB against left-handed pitching, and Weathers arrived in the best form of his season.

29th
Mariners vs left-handed pitching
.648 OPS · Weathers: 1 run in his last 18⅔ innings

The Yankees also held a meaningful late-game edge: a 3.13 bullpen ERA (2nd in MLB) against Seattle’s 3.78, behind an MLB-leading 3.30 staff ERA. If the game stayed close into the later innings, that stability raised the chance New York avoided a multi-run defeat. The model priced the cover at 77.65% — fair odds near 1.288 — making the available 1.442 a +12.01% EV position.

Key statistics

  • Records: Yankees 66–52, Mariners 56–63.
  • Offense: Yankees 531 runs / 167 HR vs Seattle 462 / 137.
  • Seattle rank 29th in MLB vs left-handed pitching (.648 OPS).
  • Weathers (NYY starter): one run across 18⅔ innings in his last three starts.
  • Bullpen ERA: Yankees 3.13 (2nd in MLB) vs Seattle 3.78; NYY staff ERA 3.30 leads the league.
  • Model: Yankees cover +1.5 at 77.65% (fair odds ~1.288); available 1.442 = +12.01% EV.

Risks

What could go wrong

Woo owned a 0.96 ERA in three career starts in the Bronx and carried a no-hitter into the eighth on his most recent visit. New York were also without Aaron Judge, Cody Bellinger and Giancarlo Stanton, with batting orders unconfirmed — a dominant Woo outing against a depleted lineup was the clearest path to a two-run defeat. Stake stayed at 1 unit.

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