San Francisco 49ers head coach Kyle Shanahan and Dallas Cowboys defensive coordinator Dan Quinn will always be intertwined.
Yes, they are the main architects in one of the biggest collapses in NFL history (look away, Falcons fans). Quinn was the head coach and Shanahan was the playcaller that brought then Falcons QB Matt Ryan to MVP levels. Then 28-3 happened, Shanahan took his offense to San Francisco, and Quinn was ultimately fired before taking a coordinator job with the Dallas Cowboys.
Now, both are the masterminds behind one of the most impressive units on both sides of the ball. You can look at any metric or rating you want
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