American Football Rules Approved Ruling 4-2-4:I

I. A player with one foot out of bounds behind a goal line touches a loose ball in the field of play. RULING: Ball is out of bounds and dead at its most forward point in the field of play. If this loose ball was an untouched free kick, it is a free kick out of bounds and a foul. Penalty – Five yards from the previous spot or Team B’s ball 30 yards beyond Team A’s free kick line. [Cited by 4-1-2-a, 4-2-4-a]