"I don't get a chance to study the league in-season, so I don't have all that data," Kelly said. "I know I can catch it out of the corner of my eye as we're breaking down game film or going to the bathroom - who's winning, who's not winning. I'm aware that the plays have gone up, but how they're doing it exactly - I haven't had a chance to study it, so I can't comment and say if it's fair to say that they're just scratching the surface.