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Game-Day Update Lineups: Probable Odds Posted 5 min read

Houston Astros vs Seattle Mariners Preview

Houston Astros visit Seattle Mariners at T-Mobile Park. Logan Gilbert starts for Seattle against TBD. Projected total 5.5 runs

Houston Astros at Seattle Mariners MLB game preview for April 12, 2026
HOU
Houston Astros
Cody Bolton ?HP
@
4:10 PM ET
T-Mobile Park
SEA
Seattle Mariners
Logan Gilbert RHP
Last updated Sunday, April 12, 2026

Key Facts

Matchup
Houston Astros at Seattle Mariners
Date
Sunday, April 12, 2026
First Pitch
4:10 PM ET
Venue
T-Mobile Park
Probable Starters
Cody Bolton (?HP) vs Logan Gilbert (RHP)
Lineups
Probable
Odds Snapshot
Apr 12, 4:11 PM ET
Last Updated
Apr 12, 7:10 AM ET

Betting Board

Snapshot Apr 12, 4:11 PM ET
Moneyline
HOU +145
SEA -160
Total
Over 7.5 -122
Under 7.5 +100
Run Line
HOU +1.5 -156
SEA -1.5 +130

Model Angles

NRFI Model
NRFI · 55%
+8.5% edge
Projected Total
5.5
model combined runs
Park Factor
0.95
Neutral · HR 0.92
First Pitch Weather
Roof
Climate controlled
The Houston Astros travel to T-Mobile Park for a 4:10 PM ET matchup against the Seattle Mariners on Monday afternoon. Seattle enters on a two-game winning streak, looking to build momentum after matching Houston's 6-9 record over their last 15 games. Logan Gilbert gets the ball for the Mariners, bringing a 5.40 ERA and 1.26 WHIP into the contest while averaging 9.72 strikeouts per nine innings. Houston has yet to announce its starting pitcher for this contest. The projected total sits at 5.5 runs, with the Astros projected for 2.8 runs and the Mariners for 2.7. T-Mobile Park's 0.95 run park factor slightly favors pitchers, and conditions should be comfortable with 72-degree temperatures and calm winds.
  • Logan Gilbert owns a 5.40 ERA and 1.26 WHIP
  • Seattle carries a two-game winning streak into Monday
  • Projected total sits at just 5.5 runs

Pitching Matchup

HOU Away
?HP · undefined-undefined · undefined GS
ERA
undefined
WHIP
undefined
K/9
undefined
IP
undefined
Career: undefined ERA · undefined WHIP · undefined K/9
SEA Home
Logan Gilbert
RHP · 0-2 · 4 GS
ERA
4.37
WHIP
1.15
K/9
9.53
IP
22.2
Career: 3.60 ERA · 1.06 WHIP · 9.52 K/9
NRFI: 72.2%
1st Inn ERA: 3.85
  • K projections: Cody Bolton at 4.8 (line 5.5)
  • Logan Gilbert projected at 5.1 (line 6.5).
  • Logan Gilbert has a 72.2% career NRFI rate. No first-inning data available for Cody Bolton.
  • This is a ?HP vs RHP matchup, creating potential platoon advantages in both lineups.

Strikeout Projections

Cody Bolton vs SEA
Proj: 4.8Line: 5.5
-0.7
Confidence:
Logan Gilbert vs HOU
Proj: 5.1Line: 6.5
-1.4
Confidence:
View all K projections on SlateIQ

Our strikeout model weighs pitcher K rate, opponent lineup whiff tendency, park factors, and umpire zone size to project total strikeouts per starter.

Cody Bolton (Houston Astros) is projected for 4.8 strikeouts against a posted line of 5.5. The projection sits 0.7 K below the line, giving the model a Neutral lean at 6/10 confidence.
Win probability on this lean: 50%.
He faces a moderate-K lineup that strikes out at 22.0% with a 28.0% whiff rate.

Logan Gilbert (Seattle Mariners) is projected for 5.1 strikeouts against a posted line of 6.5. The projection sits 1.4 K below the line, giving the model a Neutral lean at 5/10 confidence.
Win probability on this lean: 50%.
He faces a moderate-K lineup that strikes out at 22.0% with a 28.0% whiff rate.

The Houston Astros lineup is more vulnerable to strikeouts in this matchup. Seattle Mariners batters K at 22.0%, Houston Astros batters at 22.0%.

NRFI & First 5 Analysis

NRFI Model
54.8%
probability of NRFI
+8.5%
market edge
Monitor
Market implied: 46.3%Model: 54.8%
First 5 Innings
3.1est. F5 runs
HOU
— ERA
SEA
4.37 ERA
5.5 inn/start
F5 lean: Slight SEA
HOU K Projection
Cody Bolton
4.8proj
Line: 5.5
-0.7 NEUTRAL
Confidence
SEA K Projection
Logan Gilbert
5.1proj
Line: 6.5
-1.4 NEUTRAL
Confidence
Explore all model projections

Our NRFI model analyzes both starting pitchers' first-inning profiles, the top-of-order hitters in each lineup, the umpire's historical zone, and environmental factors to produce a probability estimate. For this game, the model assigns a 54.8% probability of no runs in the first inning, compared to the market's implied probability of 46.3%.

  • That creates a moderate 8.5% edge on NRFI.
  • The best available line is NRFI +116 / YRFI -154 at FanDuel.
  • Publication tier: slate_only.
  • Home plate umpire Clint Vondrak runs a tight zone. See the umpire section below for full career data.
  • Our NRFI model sits at 5-9 (35.7%) on official picks this season.

Prop Edges

2 model signals detected
Home Run Very Strong 0.5
15.9%
Home Run Very Strong 0.5
15.3%
See all today's picks and edges

Lineup & Matchup Breakdown

Houston Astros Projected
K%: 22.0
3Yordan AlvarezLLF
6Christian WalkerR1B
Whiff rate: 28.0%Team page
Seattle Mariners Projected
K%: 22.0
Whiff rate: 28.0%Team page
Batter vs Pitcher matchup tool

Lineups are projected as of this writing.

Lineup K vulnerability: 22.0% strikeout rate, 28.0% whiff rate.

Lineup K vulnerability: 22.0% strikeout rate, 28.0% whiff rate.

Ballpark, Weather & Umpire

T-Mobile Park
Run Factor0.95
HR Factor0.92
Full park profile
Home Plate Umpire
Clint Vondrak
Slightly tight NRFI: 45.2% 93 games
Full umpire profile
  • T-Mobile Park carries a 0.95 run factor (neutral).
  • Home run factor: 0.92 — the park suppresses HR power.
  • Park notes: Cool maritime climate; Lower wall in right field; Retractable roof.
  • Roof: Retractable.

Climate controlled. Roof expected closed. Standard 72F conditions, no wind factor.

  • Home plate umpire: Clint Vondrak.
  • Career NRFI rate: 45.2% across 93 games tracked.
  • Zone tendency: Slightly tight.
  • K factor: 0.952 (below average strikeouts in his games).

Run Projections & Total

  • Our projection model puts the total at 5.5 combined runs, with Houston Astros projected for 2.8 and Seattle Mariners for 2.7.
  • That's 2.0 runs below the posted total of 7.5, suggesting a lean toward the Under.
  • The run projection is essentially a coin flip between these two teams.
The Bottom Line
Seattle holds home field advantage with Gilbert on the mound against an undecided Houston starter. Both teams sit at 6-9 over their last 15 games, but the Mariners bring recent winning momentum into this low-scoring projected affair at a pitcher-friendly venue.
This preview is generated from thecapper.io projection models and publicly available data. All projections are model estimates, not guarantees. Gamble responsibly. If you or someone you know has a gambling problem, call 1-800-GAMBLER.