He tackles the transition from coordinator to head coach , slating his time at practice from defense to all teams .
Smart , on the other hand , has won four national championships under Nick Saban as a defensive coordinator .
Nick Saban tackles the transition from coordinator to head coach , slating Nick Saban 's time at practice from defense to all teams .
Smart , on the other hand , has won four national championships under Nick Saban as a defensive coordinator .