What is the penalty for an ineligible man down field?
That could mean a couple of things. On a pass play, offensive
lineman (center, guard, tackle) are not allowed to cross the line
of scrimmage prior to a pass crossing the line of scrimmage. This
infraction is called ineligible man down field. On a punt, the only
players on the punting team allowed to cross the line of scrimmage
prior to the punt are the two players positioned on the end of the
line. Should any other player except for those two players cross
the line of scrimmage prior to the punt, the infraction is called
ineligible man down field.