● ARIZONA DIAMONDBACKS VS SEATTLE MARINERS · SUNDAY, MAY 31, 2026

Arizona Diamondbacks vs Seattle Mariners Prediction

Bookie Bullies' AI-assisted prediction for Arizona Diamondbacks vs Seattle Mariners on Sunday, May 31, 2026. Made by MarcDuck with the assistance of AI software analyzing 35 factors per game. Pick: ARI.

Arizona Diamondbacks Starter
Merrill Kelly
ERA 5.25 · FIP-eff 6.42
Seattle Mariners Starter
Bryce Miller
ERA 2.25 · FIP-eff 4.65

Game Lines + Predictions

Predicted total9.0 R
Market O/U7.5
Market run line
MoneylineSEA -156
Model pickARI

Park + Conditions

Venue: T-Mobile Park. Park run factor: 0.91. The model adjusts the predicted total by both the flat park run factor (70% weight) and the hand-aware HR factor (30% weight) to capture park-by-batter-handedness effects on home runs.

Model Drivers

Active drivers behind this pick: park, recent_form. Each driver represents a factor pushing the same direction as the model's pick. More aligned drivers = higher confidence.

How This Prediction Was Made

The pick was made by MarcDuck with the assistance of AI software, not by AI alone. The AI weighs starting pitcher FIP/xFIP, bullpen quality, park factors by handedness, weather, lineup splits, recent form, line movement, and ~25 other factors. MarcDuck reviews the AI's output, refines edge cases (late injury news, narrative-driven line moves, weather updates), and formulates the final pick. Full methodology: /methodology.html.

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