"Just our chemistry, the way we're flying around, the way we're making plays," he said. "But really the preseason. Even though we weren't all out there, you could just see it. The preseason showed it. We never looked like that my first two years. I remember my first two years when (Patrick) Mahomes came in here, Josh Allen came in here, they drove down and scored the first touchdown. You look at our first (preseason) series. It's stops after stops. You look at practice. It's stops after stops, turnovers after turnovers. There's a difference in this defense, and we're not there yet, but we'll continue to get better."