[Mike Simonds]

When using the open hand technique the blocker's hands must remain open with his palms facing the opponent during the contact. By strict application of the blocking rules grabbing the opponent's jersey is a foul. It is either a foul for holding if it restrains an opponent from moving or a foul for illegal use of hands because it is a blocking technique not allowed by rule.

If I see the blocker grabbing his opponent's jersey near the point of attack and not releasing it as the runner goes past I'm going to throw my flag. In my judgement the blocker delays the defensive player long enough to allow the runner to get by. We need to be careful because some of these offensive linemen are so strong now they can grab and hold on and keep the defensive players in front of them during the block.

Same situation except I see the right tackle do this right after the snap (because he is my key to read run or pass) but the play is a quick pitch around the left end I'll hold my flag but warn the tackle between plays.