The Tigers placed Miller on unconditional release waivers Sunday.
The Tigers designated Miller for assignment Tuesday.
The Tigers are expected to designate Miller for assignment prior to Tuesday's game against the Rays, Evan Woodbery of MLive.com reports.
Miller (6-8) allowed two runs (one earned) on one hit across 1.1 innings of relief to take the loss Friday against the Red Sox. He struck out two.
Miller (5-7) allowed three runs on three hits and a walk while retiring only two batters to take the loss Sunday against the Royals.
Miller (5-6) tossed two scoreless innings of relief to earn the win in Saturday's 5-3 victory over the Reds. He allowed one hit and struck out three.
Miller (4-6) allowed three runs on three hits across an inning of work and took the loss Friday against the Angels. He struck out two.
The Tigers reinstated Miller (elbow) from the 15-day injured list Tuesday.
Miller (elbow) will be activated from the 15-day injured list as soon as Tuesday, Chris McCosky of The Detroit News reports.
Miller (elbow) will make his second rehab outing with Triple-A Toledo on Friday, Evan Petzold of the Detroit Free Press reports.