The San Francisco 49ers have been preparing for the possibility of defensive coordinator Robert Saleh's departure for some time now, but it seems obvious they are grooming Gus Bradley to take over if Saleh ends up leaving after this season.
Bradley has gotten praise from players on the roster and head coach Kyle Shanahan for the speeches he gives them before games. The defensive assistant is a high-energy guy with a lot of experience and would be a natural successor to Saleh.
The former head coach of the Jacksonville Jaguars has bounced around a lot in the NFL, serving as a defensive coordinator for several squads and gaining a reputation as a strong defensive coach.