substitute or not

[Jurassic Referee]

Originally Posted by Scrapper1

If the ref noticed the illegal jersey in the first quarter, why did he allow the player to continue to play with it?

I think the official is correct, tho. Why does it matter if the player is a sub or not?

It matters. You can't penalize 'em after they're in the game. If they go out and try to re-enter though, you can penalize them if you catch 'em before the ball becomes live. If they haven't been substituted for between quarters, you can't penalize them.