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Atlanta Braves vs Seattle Mariners Preview

Atlanta Braves visit Seattle Mariners at T-Mobile Park. Bryce Elder (1.88 ERA) opposes George Kirby (3.00 ERA) in low-scoring matchup

Atlanta Braves at Seattle Mariners MLB game preview for May 5, 2026
ATL
Atlanta Braves
Bryce Elder RHP
@
9:40 PM ET
T-Mobile Park
SEA
Seattle Mariners
George Kirby RHP
Last updated Tuesday, May 5, 2026
Final This game has finished. Read the recap for final score, model grades, and box score.

Key Facts

Matchup
Atlanta Braves at Seattle Mariners
Date
Tuesday, May 5, 2026
First Pitch
9:40 PM ET
Venue
T-Mobile Park
Probable Starters
Bryce Elder (RHP) vs George Kirby (RHP)
Lineups
Projected
Odds Snapshot
May 5, 9:41 PM ET
Last Updated
May 5, 6:06 PM ET

Betting Board

Snapshot May 5, 9:41 PM ET
Moneyline
ATL +119
SEA -130
Total
Over 8 -104
Under 8 -118
Run Line
ATL +1.5 -182
SEA -1.5 +150

Model Angles

NRFI Model
YRFI · 49%
-1.9% edge
Projected Total
4.8
model combined runs
Park Factor
0.95
Neutral · HR 0.92
First Pitch Weather
Roof
Climate controlled
The Atlanta Braves travel to T-Mobile Park to face the Seattle Mariners on Monday night in a 9:40 PM ET first pitch. Atlanta enters with a 25-11 record after dropping its last game, while Seattle sits at 17-19 following a win. Bryce Elder takes the ball for the Braves with a 1.88 ERA, 1.05 WHIP, and 7.53 strikeouts per nine innings. George Kirby counters for the Mariners, posting a 3.00 ERA, 1.13 WHIP, and 6.80 K/9. The projected total sits at just 4.8 runs with each team expected to score 2.4. Elder is projected for 5.2 strikeouts against a line of 4.5, while Kirby projects for 5.4 compared to a line of 5.5. Weather conditions call for 72 degrees with calm winds, and T-Mobile Park carries a 0.95 park factor for runs.
  • Bryce Elder brings a 1.88 ERA and 1.05 WHIP into Monday
  • George Kirby counters with 3.00 ERA for the Mariners
  • Projected total of 4.8 runs with 0.95 park factor

Pitching Matchup

ATL Away
Bryce Elder
RHP · 3-1 · 7 GS
ERA
1.88
WHIP
1.05
K/9
7.53
IP
43.0
Career: 4.33 ERA · 1.33 WHIP · 7.31 K/9
NRFI: 64.4%
1st Inn ERA: 6.54
SEA Home
George Kirby
RHP · 4-2 · 7 GS
ERA
3.00
WHIP
1.13
K/9
6.80
IP
45.0
Career: 3.55 ERA · 1.11 WHIP · 8.64 K/9
NRFI: 78.9%
1st Inn ERA: 3.35

On the season, Bryce Elder holds the ERA edge in this matchup. Bryce Elder carries a 1.88 ERA and 1.05 WHIP, while George Kirby sits at 3.00 ERA and 1.13 WHIP.
Strikeout rates: Bryce Elder at 7.53 K/9, George Kirby at 6.80 K/9.
K projections: Bryce Elder at 5.2 (line 4.5)
George Kirby projected at 5.4 (line 5.5).
First-inning scoring: Bryce Elder holds a 64.4% career NRFI rate, George Kirby at 78.9%. Combined average: 71.7%.
Both starters throw from the R side, limiting platoon splits for either lineup.

Strikeout Projections

Bryce Elder vs SEA
Proj: 5.2Line: 4.5
+0.7
Confidence:
George Kirby vs ATL
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.

Bryce Elder (Atlanta Braves) is projected for 5.2 strikeouts against a posted line of 4.5. The projection is close to the line with no actionable edge.
He faces a high-K lineup that strikes out at 25.9% with a 28.0% whiff rate.

George Kirby (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 high-K lineup that strikes out at 24.5% with a 28.0% whiff rate.

The Seattle Mariners lineup is more vulnerable to strikeouts in this matchup. Seattle Mariners batters K at 25.9%, Atlanta Braves batters at 24.5%.

NRFI & First 5 Analysis

NRFI Model
49.0%
probability of YRFI
+-1.9%
market edge
Monitor
Market implied: 51.0%Model: 49.0%
First 5 Innings
2.7est. F5 runs
ATL
1.88 ERA
6.1 inn/start
SEA
3.00 ERA
6.4 inn/start
F5 lean: Moderate ATL
ATL K Projection
Bryce Elder
5.2proj
Line: 4.5
+0.7 NEUTRAL
Confidence
SEA K Projection
George Kirby
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 49.0% probability of no runs in the first inning, compared to the market's implied probability of 51.0%.

  • That creates a slim -1.9% edge on YRFI.
  • The best available line is NRFI -104 / YRFI -118 at FanDuel.
  • Home plate umpire Will Little runs a tight zone. See the umpire section below for full career data.
  • Our NRFI model sits at 41-39 (51.2%) on official picks this season.

Prop Edges

3 model signals detected
Hits (1+) Lean Hit 0.5
69.3%
Home Run Elite 0.5
14.3%
Hits (1+) Lean Hit 0.5
58.5%
See all today's picks and edges

Lineup & Matchup Breakdown

Atlanta Braves Projected
K%: 24.5
6Drake BaldwinLC
Whiff rate: 28.0%Team page
Seattle Mariners Projected
K%: 25.9
4Cal RaleighSC
Whiff rate: 28.0%Team page
Batter vs Pitcher matchup tool

Lineups are projected as of this writing.

Atlanta Braves K vulnerability: 24.5% strikeout rate, 28.0% whiff rate.

Seattle Mariners K vulnerability: 25.9% strikeout rate, 28.0% whiff rate.

Ballpark, Weather & Umpire

T-Mobile Park
Run Factor0.95
HR Factor0.92
Full park profile
Home Plate Umpire
Will Little
Average NRFI: 42.4% 85 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: Will Little.
  • Career NRFI rate: 42.4% across 85 games tracked.
  • Zone tendency: Average.
  • K factor: 1.019 (league average strikeouts in his games).

Run Projections & Total

  • Our projection model puts the total at 4.8 combined runs, with Atlanta Braves projected for 2.4 and Seattle Mariners for 2.4.
  • That's 3.2 runs below the posted total of 8.0, suggesting a lean toward the Under.
  • The run projection is essentially a coin flip between these two teams.
The Bottom Line
This pitching matchup features Elder's elite 1.88 ERA against Kirby's solid 3.00 mark in a pitcher-friendly environment. The low 4.8-run total reflects both the quality arms and T-Mobile Park's 0.95 run factor, pointing to a defensive contest in Seattle.
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.