Pittsburgh Steelers HC Mike Tomlin and Washington Commanders HC Dan Quinn go back a long way, and thus know each other very well. Quinn was a defensive line coach at Williams & Mary when Tomlin played wide receiver there.
It was he who recommended Tomlin for his first coaching job, so Buffalo Bills HC Scott McDermott isn’t the only other head coaching William & Mary connection. But the long and short of it is Quinn knew exactly what he was going to get out of Tomlin’s Steelers. The only problem was his Commanders couldn’t stop it often enough to win.