ARLINGTON, Texas — Jerry Jones was the first one in the locker room. Closely behind him were his sons, Stephen and Jerry Jr. Dallas had just dropped to 6-6 after a 26-15 loss to the visiting Buffalo Bills. The Cowboys’ owner and general manager was certainly not having a happy Thanksgiving.

A few minutes later, coaches and players began making their way through the doors of the home team locker room at AT&T Stadium. There were blank expressions on their faces. No words were being said as they passed by reporters. After most of the team was inside, shouting began to be heard.

It was unclear at the time which player was speaking or what they were saying, but it was obvious that someone was very angry. Dak Prescott later revealed that it was veteran defensive end Michael Bennett, a former Super Bowl champion who was traded to the Cowboys last month.

Security guards attempted to quickly close the doors so media members couldn’t make out what was...