CLEVELAND, Ohio – Football, for all its rabid following and animated fandom, is exciting, but face facts: The average game has fewer than 20 minutes of action over more than three hours of real time.

Idea: We’ve all seen the scrum at a goal line or a push on fourth and short for a critical first down. Players pile up, you can’t see the ball, you can barely see the ball carrier. Joe Sixpack’s ...