The biggest concern surrounding the San Francisco 49ers' reunion with Robert Saleh is the possibility of him becoming the team's third consecutive one-and-done defensive coordinator.

The 49ers and Jets both enjoyed top-five defenses under Saleh. There’s little reason to expect Saleh to stray away from what’s made his defenses elite. There also may not be m

Robert Saleh cannot personally create turnovers, rush the passer or stop the run. His return as the 49ers’ D-coordinator is no guarantee of success.