Mariners Designate D.J. Mitchell For Assignment By Mike Axisa | December 26, 2012 at 2:23pm CDT The Mariners have designated D.J. Mitchell for assignment, the team announced. The move creates room on the 40-man roster for the recently signed Raul Ibanez. Mitchell, 25, was acquired from the Yankees in the Ichiro Suzuki trade this summer. The right-hander allowed two runs in 4 2/3 innings for New York this year while pitching to a 4.29 ERA in 134 1/3 innings down in Triple-A.