The San Francisco 49ers are actively seeking a new defensive coordinator following the departure of Nick Sorensen. The team has completed interviews with former Jets head coach Robert Saleh and Lions defensive backs coach Deshea Townsend. Head coach Kyle Shanahan expressed a desire for an experienced candidate to lead the defense, particularly after injuries exposed weaknesses in the previous season. In addition to these interviews, Shanahan has promoted Klay Kubiak to offensive coordinator. The 49ers are navigating significant staff changes, aiming to bolster their coaching lineup for the upcoming competitive season.