Author: Vladislav Musilek   

Mariners @ Astros: Free MLB Analysis — F5 Under 5.5

MLB · Free Analysis

Mariners @ Astros — F5 Under 5.5

Seattle Mariners @ Houston Astros · Hancock vs Wesneski

15 August 2026, 7:10 PM CT · Analysed by OPTIMUS II

The pick MLB · First 5 innings
First 5 Innings – Under 5.5 Runs @ 1.667
0.50Unit (reduced)
1.667Odds
68.2%Win prob.
1.702Fair price
Why half a unit? The model rated this the strongest option on the board, but the available 1.667 sits just below our fair price of 1.702 — a conservative EV of roughly −0.1%. The read is sound; the price isn’t ideal. So we keep exposure to 0.5 units rather than a full one.

Why the first five innings

Seattle are averaging only 3.87 runs per game (.229/.308/.375). Houston own the stronger offense, but this selection focuses purely on the first five innings — limiting exposure to both teams’ recently used bullpens and concentrating on the starters.

Hancock (SEA)
Starter
Wesneski (HOU)
3.35
ERA
3.86
1.12
WHIP
1.18

Hancock led on the surface; Wesneski’s 3.86 ERA comes from just 18⅔ innings, so the model discounts it rather than taking it at face value.

The projection

OPTIMUS II projected an early script of roughly 2.25–2.31, about 4.56 combined runs through five. The selection wins with five or fewer through the end of the fifth; six or more loses.

2.25Seattle
projected F5 runs
2.31Houston

≈ 4.56 combined vs a 5.5 line — a full run and a half of margin on the projection.

This was the strongest available investment from the complete 33-market, 66-selection universe — a 68.2% win read (59.9% conservative). The one caveat is price: at 1.667 against a 1.702 fair line, the value is thin, which is exactly why the recommended exposure is a half-unit rather than a full one.

Key statistics

  • Seattle averaging just 3.87 runs per game (.229/.308/.375).
  • Hancock (SEA): 3.35 ERA, 1.12 WHIP across 121 innings.
  • Wesneski (HOU): 3.86 ERA, 1.18 WHIP — but only 18⅔ innings in 2026, so the model treats it conservatively.
  • First-five projection: Seattle 2.25, Houston 2.31 — about 4.56 combined.
  • Model: 68.2% win (59.9% conservative); standard value price 1.702 vs an available 1.667.

Risks

What could go wrong

An early high-scoring sequence is the main risk. Wesneski is working with a limited post-return sample, confirmed batting orders were still unavailable, and the previous meeting produced a volatile 10–7 Houston win in extra innings — a reminder these lineups can erupt.

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