Another rule question
 

Can a covered up WR catch a screen pass?:eek::eek::eek::eek:

Only if it's a backward pass (NFHS and NCAA). Not sure about NFL.

Maybe... there's not enough information in your post to know the correct answer.

Any Team A player (or Team B player, for that matter) may legally catch a backward pass.

Any (appropriately-numbered) back or player on the end of the line of scrimmage may legally catch a forward pass.

If a forward pass has been touched by a Team B player, any Team A player may subsequently legally catch that pass.

In NFL, a WR can't be covered up at all (except in kick formation), so the question is moot there.

It's all moot under NFL rules as you have an illegal formation penalty (unless the WR reports as ineligible).