LB Fred Warner

There aren’t many linebackers in the league playing as well as Warner right now. He’s rapidly become the heartbeat and one of the emotional leaders of the 49ers’ defense since Kwon Alexander went down with a torn pectoral. He’s become as good against the run as he is in coverage, and doing both at a high level is vital against the Seahawks. His high football IQ will need to be on display as well against a talented Seattle offense. If he can blitz effectively, suss out some of their play action stuff and keep Russell Wilson from breaking off any long runs, it’ll give the 49ers a few additional stops they didn’t get against Seattle the first time.