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Chicago Cubs vs Seattle Mariners — 2026-08-21

10:10 PM ETT-Mobile ParkSP: Matthew Boyd vs Emerson HancockMLB

Model prediction

Chicago Cubs
53%
Seattle Mariners
47%
Projected
Cubs 4.5 - 4.4 Mariners

What our model sees

Our MLB model rates Chicago Cubs as the more likely winner at 53%. The driver is a 43-point Elo gap (1534 vs 1491) reflecting roster strength, recent results, and quality-of-opposition adjustments. Seattle Mariners would need above-baseline variance to flip the script. This page auto-updates with the final score and our recap once the game ends.

Recent form (last 10)

Chicago Cubs
No recent games on file.
Seattle Mariners
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