Lyons played for the Cardinal for four seasons from 2011 to '14, appearing in 43 games and amassing 128 tackles. He also had three interceptions and three forced fumbles during his time in one of the Pac-12's top defensive backfields.
"He brings great experience and ability to our secondary and special teams units. In addition, Wayne is a super individual who will achieve great things both on the field and in his future career."
Michigan finished last season 5-7 and missed the postseason. It is entering its inaugural season under new coach Jim Harbaugh, who left the NFL's San Francisco 49ers in December to become the head coach at his alma mater.
- Jack Jorgensen