Formation of an offensive line

[CO ump]

Originally Posted by jfurdell

In fact, if the left guard happens to be wearing a number other than 50-79, he's an eligible receiver b/c he's also on the end of the line.

However,
Assuming the "inside receiver" was not wearing a number 50-79 then you would have illegal numbering

[bigjohn]

Mango, are you an official?

[FeetBallRef]

Unless a scrimmage kick formation, then the numbering requirements for 50-79 are off.