PlayDecoded
Menu

Kansas City Royals at Seattle Mariners

MLBregular • 2026 Season
completed
Mariners logo
Mariners
Seattle
1
vs
Royals logo
Royals
Kansas City
4
SEA 55%45% KC
Prediction Confidence:
Moderate

Seattle Mariners 55% to win. The biggest signal favoring Mariners:

  • Home Field Advantage. Base home field advantage applied (no detailed stats available)

What would change the call

Win probability as of kickoff if a leading factor were even

  • If the home-field edge were neutral: SEA 52% (−3)

Win probability movement

SEA home win probability as the model updated before the game

Home win probability movement60%54%49%Apr 30May 3

Labels mark updates of 5 points or more, named by the factor that moved most.

Make Your Prediction

View leaderboard to see rankings

VenueT-Mobile Park
Seattle, Washington

Team Comparison

Head-to-head snapshot based on our model inputs

Royals (away)
Mariners (home)
45%
Win probability
55%
0
High-impact factors
0
0
Players ruled out
0

Post-Game Analysis

How our model performed

The Royals defeated the Mariners 4-1.

Our model predicted the Mariners would win with 55% confidence, but the Royals won against the model's expectation. Results like this help us refine the model.

Looking at the factors our model weighed:

  • Home Field Advantage favored the Mariners and was a notable factor: Base home field advantage applied (no detailed stats available)
  • Head to Head was neutral and a contributing factor: No recent head-to-head history available
  • Recent Form was neutral and a contributing factor: No recent form data available

This analysis was generated from our model's pre-game assessment compared against the actual result. Factor accuracy helps improve future predictions.

Royals won 1-4

Royals won in a close game

Prediction IncorrectWe predicted Mariners at 55%

Key Factors

What's driving the win probability for this game

  • Home Field AdvantageFavors Seattle Mariners
  • Head to HeadNeutral
  • Recent FormNeutral
  • InjuriesNeutral
  • Rest DaysNeutral
  • Weather ImpactNeutral
Sign in to see factor scores, charts, and what-if simulations

What's Driving This Game

Each factor's contribution to the final win probability

KC
SEA
Home Field Advantage
Favours KC|Favours SEA

Premium feature: factor breakdown

Start 14-day free trial →

Model vs. Market

Comparing our model against market-implied probabilities

Mariners

Our Model55%

Royals

Our Model45%

Understanding the win probability calculation

1 factor not shown (insufficient data)

Model version: 1.0.0 • Calculated: 5/3/2026, 8:45:00 AM

Key Players

Royals

Noah CameronSP
Seth LugoSP
Michael WachaSP
Stephen KolekSP
Randy DobnakSP

Mariners

Bryce MillerSP
Bryan WooSP
Kade AndersonSP
Emerson HancockSP
Logan GilbertSP

Learn About Our Analysis

Learn about the factors behind our predictions

Frequently Asked Questions

Mariners has a 55% win probability, while Royals has a 45% win probability based on our analysis.

Our model considers weather conditions, offensive and defensive efficiency, rest days, injury impact, and historical performance.

This game is being played at T-Mobile Park in Seattle, Washington.

View all MLB games