Michigan Football came out of spring ball with some holes that needed filling. It was clear Michigan needed depth in the secondary, a place kicker, and help at the WR position. There are also some level 2 needs like a back up DT and if a really good fit at QB jumped into the portal.
Michigan has tried to land another DT but not a ton of guys want to sign up to play behind some of the best DT's in college football right now. Most guys are looking for more playing time at a program with more exposure.