Locker Room Wire

Seattle Mariners

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Seattle Mariners prospect Colt Emerson makes his MLB debut as Brendan Donovan is placed on the injured list.
The Pitch

Mariners promote Colt Emerson as Brendan Donovan lands on IL

Top prospect Colt Emerson, fresh off an eight-year, $95 million contract extension, is making his MLB debut for the Seattle Mariners.

Sofia Castillo·May 18, 2026