...pass protections usually start out with the understanding that if the defense rushes five guys, you can pick them up, but your blockers will have to be able to block at least one defender (more likely 2) one-on-one. No pass protection scheme can count on double teaming all possible rushers. If you can’t handle anyone man-for-man, then a five man rush effectively becomes like a seven or eight man blitz, but also with sound coverage behind it.
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