Although new Bills DC Mike Pettine has been a 3-4 guru, he plans to run some 4-3 looks as well, depending on personnel.
"We'll be a multiple front, multiple coverage defense," said Pettine. "The trademark of our defense is we're going to be smart, tough and relentless. How we configure it is more player-driven. I've always believed that you don't fit your players to your scheme, but you fit your scheme to your players." At this point, the personnel are suited to a 4-3 scheme. Look for that to change gradually over the next year or two.