Robert Saleh is a flexible guy. As Oscar Aparicio explained on the Cool Your Jets podcast, he is extremely open to new ideas and suggestions from those around him, and he does a fantastic job of molding his defensive approach around the strengths and weaknesses of his roster.
San Francisco’s defensive scheme evolved over Saleh’s time in the Bay Area. The brand of football you saw from the 49ers defense in 2020 was much different than what you saw from the unit when Saleh first arrived in 2017.