WATCH: Bills HC Sean McDermott upset with Patriots staffers spying on warm-ups

Mike DiNovo-USA TODAY Sports

Toward the end of warm-ups before the Buffalo Bills hosted the New England Patriots Sunday, Bills head coach Sean McDermott got into it with two Patriots staffers.

McDermott was visibly upset as he caught them spying on his team’s warm-ups, and he shooed them away from his players.

One of them — the coach on the left — was Brian Belichick, who is Bill Belichick’s son.

Needless to say, it’s hardly surprising that McDermott was so heated.