[Rich]

Originally Posted by Suudy

In the Seahawks-Minnesota game, Seattle was called for illegal formation. The WH said it was because the tight-end was covered by a wide receiver. Watching the replay, it looked like they had 8 on the LOS. The play was roll out, and the flag was down before a pass was thrown. If the TE was downfield, I'd think it would be an ineligible downfield.

Does the NFL require exactly 7 on the line? Why was this a foul for illegal formation?

It's an illegal formation foul for an eligible-number receiver to be covered up in the NFL.