How do you identify eligible/ineligible recievers?

[With_Two_Flakes]

By "covered up", he means someone on the line with an eligible number who is supposed to be on the end of the line. But they are not on the end of the line because someone out wide, who should be off the line has messed up and is on the line and therefore "covering him up".

Example:- Formation should be,

..................82..71..68..55..62..77........89
..84

but #84 messes up and it actually is

..84.............82..71..68..55..62..77........89

so #82 is "covered up" because of #84's mistake.