ANN ARBOR -- Don Brown insists there are reasons why he's not concerned.
His top-ranked defense has to replace 10 starters with a number of players who have never seen heavy snaps on the college level.
Most of the talent that allowed Michigan to hold opponents to just 261.8 yards per game last season is now in the NFL. Still, Brown has his reasons. He looks at his depth chart and he doesn't see names of players who aren't ready for the spotlight.
He sees players like Devin Bush Jr. And he smiles.
"Devin Bush Jr.