2009
On January 29, 2009, Sweeney signed a minor league deal with an invitation to spring training with the Seattle Mariners, citing his desire to play for Mariners' manager Don Wakamatsu who was Sweeney's bench coach in Oakland. Sweeney made the major-league club Opening Day roster as a bench player. On April 22, 2009, Sweeney left the game during his first at-bat due to back spasms.
On May 3, 2009, Sweeney hit his first home run as a Mariner and 200th of his career in the 4th inning at Safeco Field against the Oakland Athletics. On August 6, in a return to Kansas City, Sweeney hit his 100th home run in Kauffman Stadium in an 8-2 loss to the Royals.
On November 5, 2009, Sweeney declared free agency.
Read more about this topic: Mike Sweeney, Major League Career, Career Since: Athletics, Mariners, and Phillies