The 31-year-old Miller pitched in one game for the Yankees this season, yielding three runs in just 1 1/3 innings of work. He was much better for the Yankees' Triple-A affiliate, pitching to a 3.55 ERA with 13.1 K/9 and 3.6 BB/9 in 63 1/3 innings of work.
Originally an eighth-round pick by the Rockies in 2004, Miller has spent time in the Orioles and Athletics organizations as well. The bulk of his Major League experience came last year with the A's, when he posted a 2.59 ERA in 48 2/3 innings for the AL West champions.
As always, you can track the status of Miller and other players who have been designated for assignment using MLBTR's DFA Tracker.