2015 – The Mariners fire General Manager Jack Zduriencik after 8 seasons during which the team failed to reach the postseason. He is replaced on an interim basis by his assistant, Jeff Kingston.

On August 28, 2015 — 2015 – The Mariners fire General Manager Jack Zduriencik after 8 seasons during which the team failed to reach the postseason. He is replaced on an interim basis by his assistant, Jeff Kingston.


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Sources:
Baseball Reference August 28
National Pastime August 28
Retro Sheet
Hall of Fame
SABR Games Project
Replay The Game