The NFL players' union has demanded better working conditions, including limits on contact practices, a day off during the week, and time off during the offseason, but it's another story for coaches.

Coaches can be expected to work as much as 20 hours daily without a day off, sometimes for the entire calendar year.

"It's time for our coaches to unionize," Brandon Marshall says. "We've had four coaches in the hospital this year. If people understood how many hours, and what it takes to be a head coach, how many hours they put in, it would be an issue."

Todd Bowles, Marshall's coach with the New York Jets, was one of those coaches. Bowles got out of the hospital and went straight back to work.