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Illegal Formation

What is Illegal Formation?

"Illegal formation" is the name given to a five-yard penalty that is called against the offense when it fails to line up according to specific guidelines.

Sporting Charts explains Illegal Formation

There are several different improper ways of lining up that can result in an illegal formation penalty. For example, having fewer than seven players line up on the line of scrimmage, having eligible receivers who fail to line up as the leftmost and rightmost players on the line, or having five properly numbered ineligible players fail to line up on the line.

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