Let me try one and you guys tell me the legality. It happened to me a few years ago.
After an unsuccessful 3rd down conversion attempt. The ball is marked ready for play and coach decides to punt. 5 A members run on the field and 5 replaced players come off the field with a 6th player with them stopping on the sideline and lines up in formation.
B saw it and called timeout, so nothing came of it.
What do you guys have, if anything?