Robert Saleh is a top-five defensive coordinator in the NFL. You can bet that his 49ers defense will keep opposing offenses off balance.

Robert Saleh is back in as defensive coordinator for the San Francisco 49ers and former players are confident in his return.

Robert Saleh is one of the best defensive coordinators in the NFL, but he's not infallible.

Bosa said he appreciates Saleh now more than ever, no disrespect intended to the coordinators who bridged the past four years – DeMeco Ryans, Steve Wilks and Nick Sorensen.