Merkins,
1. Can anyone pass the ball in NFL or is it only limited to the QB ?
2. Why do some players throw themselves at the legs of a ball carrier, rather than use their arms to tackle ? I have seen a few touch downs this weekend that could have been avoided if only the merkin used their arms to wrap him up.
3. Why do they wear mouth guards when they already have a cage on their face ?
1) Theoretically, anyone can pass the ball (forward), but the circumstances under which they can do so are limited. There can only be one forward pass on any play, and that pass must be thrown from behind the line of scrimmage. You can throw as many lateral passes on a play as you like, and you can throw them beyond the line of scrimmage. The QB, in fact, was not initially the main passer in the years immediately after they first allowed the forward pass. Every now and then you'll see the a fake play that develops like a run, but the HB fades right and passes downfield. Teams also fake punt, and let the punter throw down field
2) Because you only have knock the runner over to complete a tackle. They don't need to be touched while on the ground as is the case in league.
3) Coz helmets get ripped off, and coz the face guard has gaps.