Mariners designated RHP D.J. Mitchell for assignment.
The move cleared room for the newly-signed Raul Ibanez on the 40-man roster. Mitchell, who was acquired from the Yankees in the Ichiro deal, made four appearances in the majors this year and posted a 4.29 ERA over 22 starts and one relief appearance at the Triple-A level. The 25-year-old right-hander could draw interest on waivers.