Locker room cohesion doesn’t produce statistical data. There’s no way to measure it other than to listen to what’s being said and to watch how the guys mentioned produce in an upcoming game, but if you’re looking for evidence about whether or not team chemistry both on and off the field is important, look no further than what you saw from the Philadelphia Eagles in 2019 and how the team has always responded to fixtures on the roster like Jason Kelce.
When you think of the vocal leaders on the field and in the locker room over the course of the Doug Pederson era or longer, names like Jason Peters, Malcolm Jenkins, and Nigel Bradham come up.