There have been 20 managers in the history of the Seattle Mariners Major League Baseball (MLB) franchise.
In terms of tenure, Lou Piniella has managed more games and seasons than any other coach in their franchise history.
In 2007, manager Mike Hargrove resigned in a surprise move amidst a winning streak, citing increased difficulty in putting forth the same effort he demanded of his players.
[10] A year later, in 2008, the Mariners front office decided McLaren was not performing by their standards, and was fired and replaced by interim manager Jim Riggleman.
[11] New general manager Jack Zduriencik hired Don Wakamatsu as skipper for the 2009 season; after finishing the season with a .525 winning percentage, the team's poor performance coupled with off-field issues led to Wakamatsu's firing on August 9, 2010.