That SF defense is legit. Their front seems unblockable at times. Bosa is a monster already and the guy is only a rookie. His addition has also opened up things for Buckner and Armstead. With the DL taking up so much of the focus on the interior Warner is starting to come into his own as well. They also have an excellent DC who will probably be in line for a HC gig REALLY soon. Outside of the vets in the defensive backfield they are young, relentless, and get after it.