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Kyle Shanahan discusses 4-3, 3-4 nuance and what he expects from Seahawks-style defense

New San Francisco 49ers head coach Kyle Shanahan made an appearance on KNBR Friday morning, marking the first of what should be many head coach interviews with the 49ers flagship station. He talked about just about anything you can imagine (audio), but the defensive discussion was what fascinated me most.

Shanahan confirmed Robert Saleh would be his defensive coordinator, and they got into a lot of detail about where Saleh comes from, and what this means for the defense. Shanahan said they would run a defense similar to what Seattle has run.