Originally posted by NinerGM:
Can someone show me the difference between lowering your shoulder and lowering your head? I mean I'm really waiting for the NFL refs who are already pretty blind ell me the difference in the pro game. These guys even determine what PI, holding or a catch is now we're asking them in real time to judge more nuance?
You can lower your shoulder while still keeping your head up. You can't lower your head while keeping your head up.