Mariners Hire CJ Gillman as Hitting Coach
The Seattle Mariners have selected CJ Gillman to join their coaching staff as the team's new hitting coach.
Updated on Oct. 30, 2026 in Baseball
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The Seattle Mariners have officially hired CJ Gillman to serve as their hitting coach for the upcoming 2027 season. Gillman transitions to the role after previously serving as the director of hitting for the Washington Nationals.
Why it matters
This move adds a strategist to the Seattle coaching staff who is known for overseeing offensive development and high-level production in Washington. His presence is guaranteed for the upcoming year regardless of who the team selects as its manager.
In 2026, the Washington offense under Gillman recorded 210 homers, 281 doubles, and 1,355 total hits. These figures placed the team in the top ten across all major offensive categories.
The players
CJ Gillman
He is a professional baseball coach who previously managed hitting operations for the Washington Nationals.
Seattle Mariners
The Seattle Mariners are a professional baseball team competing in the American League West division.
Washington Nationals
The Washington Nationals are a professional baseball team competing in the National League East division.
The details
Gillman previously implemented a specific hitting philosophy for the Nationals that emphasized crushing strikes in the air to maximize offensive output. During his tenure, he focused heavily on developing talent throughout the organization's minor league system.
Timeline
From 2022 to 2025, Gillman worked as the minor league hitting coordinator for the Nationals.
During the 2026 season, he served as the director of hitting for Washington.
Beginning in 2027, Gillman will take over as the hitting coach for the Mariners.
Season Trajectory
This hire signals an aggressive shift in the Mariners' offensive approach to mirror the productive hitting environments seen in Washington. The move aims to bolster run production to help the team remain competitive within the American League playoff landscape.
The transition brings a new offensive philosophy that will dictate the team's approach to plate discipline and pitch selection in 2027. Fans can expect a shift in hitting metrics as players begin implementing the new coaching staff's hitting mantra.
The takeaway
Teams frequently overhaul coaching staffs to import successful offensive strategies from high-performing competitors. Implementing a consistent hitting mantra often serves as a foundational step for organizations looking to improve their yearly run totals.
Further reading
For more background on the team's organizational changes, visit the Seattle Baseball section.
Source note: This article includes information reported by Sports Illustrated.
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