One of the aspects to the increasing difficulty that comes with succeeding in the NFL, and a factor that rarely gets talked about, is good head coaches losing good assistant coaches to the rest of the league. Coaches who not only take concepts and philosophies to their new teams, but who are also more prepared to face their former team and the many copycats around the NFL who steal by watching film. Since the end of his first season with the L.A. Rams, Sean McVay has lost coaches like Matt LaFleur, Zac Taylor, Kevin O’Connell, Brandon Staley, Ejiro Evero, Thomas Brown, Shane Waldron, and Joe Barry.