The Seattle Mariners have been the most active team this offseason, and they're not done yet.

First baseman Ryan Garko has agreed with the team on a one-year contract worth $550,000.

The Mariners added Garko to fill a much needed right-handed bat void. 

Garko will likely split time at first base with newly-acquired Casey Kotchman. He'll also likely see time as a designated hitter.

If Garko becomes a regular in the Mariners lineup, his contract terms allow his salary to nearly double to $1,075,000. His contract defines a regular as making at least 600 plate appearances, something Garko hasn't done yet in his five-year career.

He spent his first four and a half seasons in Cleveland before being traded to San Francisco mid-way through last season. 

Garko is a career .279 hitter, with season highs of 21 home runs, and 90 RBI in 2007 and 2008 respectively.

He'll likely hit fifth or sixth in a lineup that now features some pop with Chone Figgins and Milton Bradley now a part of it.