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CJ Gillman to be hired as Mariners hitting coach (sources)

SEATTLE -- As the Mariners press through the decision-making phase of hiring their new manager, they have already landed the hitting coach that will join the selected candidate’s Major League staff. CJ Gillman, who was Seattle’s Minor League hitting coordinator…

By Daniel Kramer · MLB Official

Published: Friday, 30 October 2026 at 10:46 PM

Key Things to Know

CJ Gillman will reportedly be hired as the Seattle Mariners' new Major League hitting coach.
Gillman previously worked as Seattle's Minor League hitting coordinator from 2022 to 2025.
He spent the 2026 season serving as the director of hitting for the Washington Nationals.

The Story in 60 Seconds

The Seattle Mariners are set to hire CJ Gillman as their new Major League hitting coach for the 2027 season, according to sources. Gillman previously served as Seattle's Minor League hitting coordinator from 2022 to 2025 before working as the director of hitting for the Washington Nationals in 2026. The Mariners have not yet officially confirmed the move.

Gillman will replace Kevin Seitzer following an offensive downturn where Seattle ranked near the bottom of several Major League offensive categories in 2026. He brings established familiarity with key young Mariners players, including Michael Arroyo, Colt Emerson, Lazaro Montes, and Cole Young.

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CJ Gillman to be hired as Mariners hitting coach (sources)

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