Detroit Free Press
Most of the unknowns surrounding Michigan football's new defense following the dismissal of former coordinator Don Brown originate from the exterior: fans, media members, opponents and donors all speculating about the scheme employed by fresh-faced Mike Macdonald ever since his arrival from the Baltimore Ravens in January.
But there is one unknown — one confounding riddle — that can’t be answered even by the players, coaches, staffers and alums who have watched the Wolverines practice behind closed doors in the spring and summer: How will Macdonald handle the stress of calling plays for the first time?