[jaybird]

Originally Posted by Reffing Rev.

If the ball is in the zone when the block is BEGUN then the ball is in the zone for the block...in other words if at the snap a lineman begins to block low, he may do so even if at the moment of contact the ball has already left the zone. If he stands or retreats before going low, and the ball has left before he starts his block then he's guilty.

That is the interpretation we were given in Oklahoma as well.