[MN BB Ref]

When I was in High School we used to play against a team that used this play a few times a year. They called it their "Sleeper Play".

In this case the WR would be on the field for the previous play, but then he would jog off to the sideline after the play. However he would never leave the field. Instead he would stand at the edge and appear to talk to the coach. The rest of the team would huddle and form at the line of scrimmage in a tight formation without him. However he would already be lined up on the line and they would then throw a quick out pass to him.

I never seen this called for a penalty as they informed the refs before the game that this play would be used.

Legal or not? I think this would be legal. I'd be interested in everyone else's opinions though.