Mariners Announce 2026 Coaching Staff
The Seattle Mariners recently announced their 2026 coaching staff. The staff experienced relatively little turnover from 2025 to 2026, with only the notable departures of Kristopher Negrón to join the Pittsburgh Pirates staff, Tony Arnerich to the Guardians, and the return of Louis Boyd to player development as assistant director.
2026 Staff Overview
Departures
Negrón had been a longtime part of the Mariners organization, first as a player for part of the 2018 season and then, following his retirement from play in 2019, serving as an assistant to the director of player development and as manager of the Mariners Triple-A affiliate, the Tacoma Rainiers. He deftly guided the Rainiers to Triple-A West champs in 2021 before being promoted to the big league squad as first base coach in 2022 and then transitioned over to third base coach for the 2024 season. Negrón now takes on a new challenge as the Pittsburgh Pirates’ bench coach, and I don’t doubt we will see that followed by a manager position in the future.
Louis Boyd has moved back into the front office, moving from fielding coordinator to a player development role as an assistant director. The Mariners only committed 69 (nice) errors as a team last year, good enough for the third-best record in the league. The Mariners were also above the AL average for defensive efficiency and overall fielding percentage, but near the bottom of the AL in defensive runs saved above average due largely to dwindling athleticism in the infield.
Tony Arnerich has now accepted a role with the Cleveland Guardians as their new bench coach. Arnerich previously took on the bullpen coach role after Stephen Vogt vacated it in favor of becoming the Guardians’ new manager in 2023. Arnerich has worked in the Mariners organization since 2017, including assistant hitting coordinator and catching coordinator, Minor League field and catching coordinator, hitting coach, and, for the past two seasons, bullpen coach. Arnerich is the second Mariner to depart for Cleveland this offseason and the second to have previously worked with Vogt, as he joins former assistant GM Andy McKay, who also departed this offseason to become the Guardians’ new fielding coordinator.
Among changes to the coaching staff, coaching assistant and replay coordinator Andy Bissell has also left the team to pursue other paths, he announced on Xitter this past November.
Leave a Reply