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Athletics vs Seattle Mariners Preview

Athletics visit Mariners at 9:40 PM ET. Emerson Hancock (2.28 ERA) faces J.T. Ginn (3.31 ERA) as Seattle looks to extend two-game win streak

Athletics at Seattle Mariners MLB game preview for April 20, 2026
ATH
Athletics
J.T. Ginn RHP
@
9:40 PM ET
T-Mobile Park
SEA
Seattle Mariners
Emerson Hancock RHP
Last updated Monday, April 20, 2026
Final This game has finished. Read the recap for final score, model grades, and box score.

Key Facts

Matchup
Athletics at Seattle Mariners
Date
Monday, April 20, 2026
First Pitch
9:40 PM ET
Venue
T-Mobile Park
Probable Starters
J.T. Ginn (RHP) vs Emerson Hancock (RHP)
Lineups
Projected
Odds Snapshot
Apr 20, 9:41 PM ET
Last Updated
Apr 20, 6:10 PM ET

Betting Board

Snapshot Apr 20, 9:41 PM ET
Moneyline
ATH +130
SEA -137
Total
Over 8 -115
Under 8 -105
Run Line
ATH +1.5 -166
SEA -1.5 +138

Model Angles

NRFI Model
YRFI · 40%
-13.5% edge
Projected Total
1.9
model combined runs
Park Factor
0.95
Neutral · HR 0.92
First Pitch Weather
Roof
Climate controlled
The Athletics travel to T-Mobile Park to face the Seattle Mariners in a 9:40 PM ET matchup featuring contrasting pitching profiles. Emerson Hancock takes the ball for Seattle with a 2.28 ERA, 0.76 WHIP, and 9.51 strikeouts per nine innings, while J.T. Ginn counters for the Athletics with a 3.31 ERA, 0.98 WHIP, and 6.06 strikeouts per nine. The Mariners bring a 10-13 record and a two-game winning streak into the contest. Conditions at T-Mobile Park call for 72-degree temperatures with no wind, while the park factor sits at 0.95 runs. The projected total stands at 1.9 runs, with the entire output expected from Seattle. Brendan Donovan enters hitting .291 against right-handed pitching, providing a key bat in the lineup.
  • Hancock brings 2.28 ERA and 9.51 strikeouts per nine
  • Mariners carry 10-13 record on two-game winning streak
  • Donovan hitting .291 against right-handed pitchers

Pitching Matchup

ATH Away
J.T. Ginn
RHP · 0-0 · 2 GS
ERA
3.31
WHIP
0.98
K/9
6.06
IP
16.1
Career: 4.67 ERA · 1.31 WHIP · 8.89 K/9
NRFI: 52.9%
1st Inn ERA: 8.47
SEA Home
Emerson Hancock
RHP · 2-1 · 4 GS
ERA
2.28
WHIP
0.76
K/9
9.51
IP
23.2
Career: 4.49 ERA · 1.28 WHIP · 6.47 K/9
NRFI: 61.9%
1st Inn ERA: 7.03

On the season, Emerson Hancock holds the ERA edge in this matchup. J.T. Ginn carries a 3.31 ERA and 0.98 WHIP, while Emerson Hancock sits at 2.28 ERA and 0.76 WHIP.
Strikeout rates: J.T. Ginn at 6.06 K/9, Emerson Hancock at 9.51 K/9.
K projections: J.T. Ginn at 4.6 (line 5.5)
Emerson Hancock projected at 5.4 (line 5.5).
First-inning scoring: J.T. Ginn holds a 52.9% career NRFI rate, Emerson Hancock at 61.9%. Combined average: 57.4%.
Both starters throw from the R side, limiting platoon splits for either lineup.

Strikeout Projections

J.T. Ginn vs SEA
Proj: 4.6Line: 5.5
-0.9
Confidence:
Emerson Hancock vs ATH
Proj: 5.4Line: 5.5
-0.1
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.

  • J.T. Ginn (Athletics) is projected for 4.6 strikeouts against a posted line of 5.5. The projection is close to the line with no actionable edge.
  • He faces a moderate-K lineup that strikes out at 22.0% with a 28.0% whiff rate.

Emerson Hancock (Seattle Mariners) is projected for 5.4 strikeouts against a posted line of 5.5. The projection is close to the line with no actionable edge.
He faces a moderate-K lineup that strikes out at 22.0% with a 28.0% whiff rate.

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

NRFI & First 5 Analysis

NRFI Model
40.0%
probability of YRFI
+-13.5%
market edge
Monitor
Market implied: 53.5%Model: 40.0%
First 5 Innings
1.1est. F5 runs
ATH
3.31 ERA
8.1 inn/start
SEA
2.28 ERA
5.8 inn/start
F5 lean: Moderate SEA
ATH K Projection
J.T. Ginn
4.6proj
Line: 5.5
-0.9 NEUTRAL
Confidence
SEA K Projection
Emerson Hancock
5.4proj
Line: 5.5
-0.1 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 40.0% probability of no runs in the first inning, compared to the market's implied probability of 53.5%.

  • That creates a slim -13.5% edge on YRFI.
  • The best available line is NRFI -115 / YRFI -105 at FanDuel.
  • Home plate umpire Malachi Moore runs a average zone. See the umpire section below for full career data.
  • Our NRFI model sits at 16-22 (42.1%) on official picks this season.

Prop Edges

4 model signals detected
Home Run Elite 0.5
24.7%
Home Run Very Strong 0.5
15.3%
Home Run Very Strong 0.5
14.6%
Home Run Elite 0.5
24.1%
See all today's picks and edges

Lineup & Matchup Breakdown

Athletics Projected
K%: 22.0
Projected batting order unavailable. This will update when probable or confirmed lineup data is available.
Whiff rate: 28.0%Team page
Seattle Mariners Projected
1Brendan DonovanL2B
Batter vs Pitcher matchup tool

Lineups are projected as of this writing.

Seattle Mariners 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
Malachi Moore
Average NRFI: 38.6% 88 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: Malachi Moore.
  • Career NRFI rate: 38.6% across 88 games tracked.
  • Zone tendency: Average.
  • K factor: 1.016 (league average strikeouts in his games).

Run Projections & Total

  • Our projection model puts the total at 1.9 combined runs, with Athletics projected for 0.0 and Seattle Mariners for 1.9.
  • That's 6.1 runs below the posted total of 8.0, suggesting a lean toward the Under.
  • The run projection favors Seattle Mariners by 1.9 runs.
The Bottom Line
Hancock holds clear advantages in ERA, WHIP, and strikeout rate over Ginn. Seattle enters with momentum from consecutive victories. The projected total of 1.9 runs suggests a low-scoring affair at T-Mobile Park with favorable weather conditions.
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.