Robert Saleh is reprising his role as the 49ers’ defensive coordinator, the team announced Friday night. Saleh returns to a vastly different unit than he left behind four years ago. Fred Warner and Nick Bosa are the only starters still under contract from Saleh’s initial 2017-20 regime,

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.