# Yokohama DeNA BayStars roster and management updates

> Live situation record from CLSTR: https://clstr.news/situations/yokohama-dena-baystars-roster-and-management-updates
> Updated: 2026-10-06T03:49:58.000Z. Sources: 5. Developments: 2.

The Yokohama DeNA BayStars have undergone roster and leadership developments following the conclusion of the season. Manager Ryoji Aikawa has been confirmed to remain in his position for the 2027 season. Owner Tomoko Namba credited Aikawa with navigating a season of injuries and roster changes, noting the team’s comeback to a third-place finish.

Concurrently, left-handed pitcher Ryunosuke Matsumoto announced his retirement from professional baseball. Matsumoto, who joined the team in 2020, decided to end his career after the club chose not to renew his contract for the upcoming season.

## Timeline

### 2026-10-06: Ryunosuke Matsumoto announces retirement from Yokohama DeNA BayStars

Yokohama DeNA BayStars pitcher Ryunosuke Matsumoto has announced his retirement from professional baseball after joining the team in 2020.

4 sources. https://clstr.news/cluster/ryunosuke-matsumoto-announces-retirement-from-yokohama-dena-baystars

### 2026-10-04: Ryoji Aikawa to remain manager of Yokohama DeNA BayStars

Ryoji Aikawa will continue as manager of the Yokohama DeNA BayStars for the 2027 season following a third-place finish.

3 sources. https://clstr.news/cluster/ryoji-aikawa-to-remain-manager-of-yokohama-dena-baystars

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Cite as: Yokohama DeNA BayStars roster and management updates. CLSTR, https://clstr.news/situations/yokohama-dena-baystars-roster-and-management-updates