Early Preview Lineups: Projected Odds Posted 6 min read

Kansas City Royals vs Seattle Mariners Preview

Kansas City Royals visit Seattle Mariners tonight at 9:45 PM ET. Cole Ragans opposes Bryan Woo in a low-scoring pitching matchup at T-Mobile Park

Kansas City Royals at Seattle Mariners MLB game preview for May 1, 2026
KC
Kansas City Royals
Cole Ragans LHP
@
9:45 PM ET
T-Mobile Park
SEA
Seattle Mariners
Bryan Woo RHP
Last updated Friday, May 1, 2026
Final This game has finished. Read the recap for final score, model grades, and box score.

Key Facts

Matchup
Kansas City Royals at Seattle Mariners
Date
Friday, May 1, 2026
First Pitch
9:45 PM ET
Venue
T-Mobile Park
Probable Starters
Cole Ragans (LHP) vs Bryan Woo (RHP)
Lineups
Projected
Odds Snapshot
May 1, 9:46 PM ET
Last Updated
May 1, 11:13 AM ET

Betting Board

Snapshot May 1, 9:46 PM ET
Moneyline
KC +128
SEA -138
Total
Over 7 -112
Under 7 -108
Run Line
KC +1.5 -184
SEA -1.5 +152

Model Angles

NRFI Model
NRFI · 59%
+5.7% edge · playable
Projected Total
4.7
model combined runs
Park Factor
0.95
Neutral · HR 0.92
First Pitch Weather
Roof
Climate controlled
The Kansas City Royals visit the Seattle Mariners at T-Mobile Park tonight for a 9:45 PM ET first pitch. The Royals enter at 12-19 on a two-game losing streak, while the Mariners sit at 16-16 and have won two straight. Left-hander Cole Ragans starts for Kansas City with a 5.00 ERA, 1.48 WHIP, and 11.00 strikeouts per nine innings. Seattle counters with right-hander Bryan Woo, who brings a 3.86 ERA, 1.06 WHIP, and 6.94 strikeouts per nine. The projected total sits at 4.7 runs with both teams expected to score 2.4 apiece. Weather conditions show 72 degrees with no wind, and T-Mobile Park carries a 0.95 run park factor. Bobby Witt Jr. leads the Royals offense with a .307 average against right-handed pitching.
  • Mariners have won two straight games entering tonight
  • Cole Ragans posts 11.00 strikeouts per nine innings
  • Bobby Witt Jr. hitting .307 against right-handed pitchers

Pitching Matchup

KC Away
Cole Ragans
LHP · 1-4 · 6 GS
ERA
5.00
WHIP
1.48
K/9
11.00
IP
27.0
Career: 3.74 ERA · 1.21 WHIP · 10.82 K/9
NRFI: 79.7%
1st Inn ERA: 2.79
SEA Home
Bryan Woo
RHP · 1-2 · 6 GS
ERA
3.86
WHIP
1.06
K/9
6.94
IP
35.0
Career: 3.26 ERA · 0.99 WHIP · 8.76 K/9
NRFI: 68.6%
1st Inn ERA: 4.92

On the season, Bryan Woo holds the ERA edge in this matchup. Cole Ragans carries a 5.00 ERA and 1.48 WHIP, while Bryan Woo sits at 3.86 ERA and 1.06 WHIP.
Strikeout rates: Cole Ragans at 11.00 K/9, Bryan Woo at 6.94 K/9.
K projections: Cole Ragans at 5.1 (line 6.5)
Bryan Woo projected at 4.4 (line 5.5).
First-inning scoring: Cole Ragans holds a 79.7% career NRFI rate, Bryan Woo at 68.6%. Combined average: 74.2%.
This is a LHP vs RHP matchup, creating potential platoon advantages in both lineups.

Strikeout Projections

Cole Ragans vs SEA
Proj: 5.1Line: 6.5
-1.4
Confidence:
Bryan Woo vs KC
Proj: 4.4Line: 5.5
-1.1
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.

Cole Ragans (Kansas City Royals) is projected for 5.1 strikeouts against a posted line of 6.5. 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.

Bryan Woo (Seattle Mariners) is projected for 4.4 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 Kansas City Royals lineup is more vulnerable to strikeouts in this matchup. Seattle Mariners batters K at 22.0%, Kansas City Royals batters at 22.0%.

NRFI & First 5 Analysis

NRFI Model
58.6%
probability of NRFI
+5.7%
market edge
Signal
Market implied: 52.8%Model: 58.6%
First 5 Innings
2.6est. F5 runs
KC
5.00 ERA
4.5 inn/start
SEA
3.86 ERA
5.8 inn/start
F5 lean: Moderate SEA
KC K Projection
Cole Ragans
5.1proj
Line: 6.5
-1.4 NEUTRAL
Confidence
SEA K Projection
Bryan Woo
4.4proj
Line: 5.5
-1.1 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 58.6% probability of no runs in the first inning, compared to the market's implied probability of 52.8%.

  • That creates a moderate 5.7% edge on NRFI.
  • The best available line is NRFI -112 / YRFI -108 at FanDuel.
  • This qualifies as a playable in our publication system.
  • Home plate umpire Adam Hamari runs a wide zone. See the umpire section below for full career data.
  • Our NRFI model sits at 34-33 (50.7%) on official picks this season.

Prop Edges

2 model signals detected
Home Run Elite 0.5
19.9%
Bobby Witt Jr.
Home Run Very Strong 0.5
13.5%
See all today's picks and edges

Lineup & Matchup Breakdown

Kansas City Royals Projected
K%: 22.0
5Bobby Witt Jr.RSS
Whiff rate: 28.0%Team page
Seattle Mariners Projected
K%: 22.0
5Cal RaleighSC
Whiff rate: 28.0%Team page
Batter vs Pitcher matchup tool

Lineups are projected as of this writing.

Kansas City Royals K vulnerability: 22.0% strikeout rate, 28.0% whiff rate.

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
Adam Hamari
Average NRFI: 50.0% 94 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: Adam Hamari.
  • Career NRFI rate: 50.0% across 94 games tracked.
  • Zone tendency: Average.
  • K factor: 1.025 (above average strikeouts in his games).

Run Projections & Total

  • Our projection model puts the total at 4.7 combined runs, with Kansas City Royals projected for 2.4 and Seattle Mariners for 2.4.
  • That's 2.3 runs below the posted total of 7.0, suggesting a lean toward the Under.
  • The run projection is essentially a coin flip between these two teams.
The Bottom Line
Seattle holds home advantage with momentum from consecutive wins while Kansas City arrives on a two-game slide. The projected total of 4.7 runs reflects strong pitching matchups at a pitcher-friendly venue. NRFI carries a 57 percent probability with a 4.7 percent edge.
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.