The NFL is going to start compelling teams to participate in the HBO training camp reality series “Hard Knocks” if teams don’t start stepping up to the plate, but Bill Belichick and the Patriots shouldn’t be too worried. The NFL included enough corollaries in its new rule that the Patriots likely won’t be on the show any time soon. Teams would be exempt from being compelled to be on the show if: they made the playoffs in any of the past two seasons; have a new head coach; or participated in the series over the past 10 years.