Michigan, Jim Harbaugh tap Ravens LB coach Mike Macdonald as next defensive coordinator | CBS Sports Headlines Michigan, Jim Harbaugh tap Ravens LB coach Mike Macdonald as next defensive coordinator Macdonald goes from working for John Harbaugh to Jim Harbaugh in his return to college ESN FeedsThis post was originally … Continue reading Michigan, Jim Harbaugh tap Ravens LB coach Mike Macdonald as next defensive coordinator