Bob Field and Marc Dove both sit in the press box during game time and communicate via headset with defensive coordinator Rocky Long. It's critical that he knows what personnel is in the game before he decides what defense we want to be in. We're two more sets of eyes up in the press box, watching their sideline, watching who's leaving and watching who's coming in. That all leads to him making a decision as to what defense to use. When Long does choose a defense and when he signals it in, every defensive player on the field had better be paying attention.
Every defensive player is responsible for looking to the sideline to see the play.
With plays being signaled in from the sidelines, coaches have to deal with players potentially getting in the way of the signal. That's where Kevin Yoxall comes in. Sometimes it gets awfully hectic on the sideline. As long as football has been played, I assume that has been a problem. I'm sure as long as they coach football, unless they chain 'em to the bench, players will always be wanting to crowd and get up close.