His predecessor , Don Brown , left to join Jim Harbaugh 's staff at Michigan after guiding the Eagles to the nation 's No. 1 ranking in total defense .
Reid 's task is much different , but challenging in its own way .
Reid 's predecessor , Don Brown , left to join Jim Harbaugh 's staff at Michigan after guiding the Eagles to the nation 's No. 1 ranking in total defense .
Reid 's task is much different , but challenging in its own way .