Also, you lost Ramos.
I know Northwestern's is a bit different as the guys who left were Grad Students and of the four gents Michigan got, only one has more than one year (there 'Free' Covid one) in Cannon, who has two (2) seasons of eligibility remaining.
That said, they have three 125lbers on the roster, two are true frosh and one is an incoming redshirt soph who went 3-8 his redshirt frosh season at Buffalo. They have zero 133lbers on the roster and the covid stuff also screwed up their 149-165 lineups. You have Chumbley and Mayfield at 157/165 when one should be down at 149 - but having to wrestle a season up at 165 may have made it so Mayfield can't get back down to 149 as efficiently as originally planned. So now they have two decent 165lbers and nowhere for the one to go because 157 and 174 are also covered.
Read that all in one breath, btw. That is how I imagined it being done.