Jun 14 1:22p
Blanco signed with the Mariners on Friday, FOX Sports' Ken Rosenthal reports.
Blanco will take Kelly Shoppach's roster spot and presumably serve as the backup to Mike Zunino. Blanco is 41 years old and has gone just 19-for-102 at the plate with one home run since the beginning of the 2012 season. He will probably see 1-3 starts per week in a backup role, but could see a bit more than that if Zunino struggles badly or suffers an injury.