You're talking about the Huntington North Borderswar. Kris Workman, had to forfeit the Championship match. He had to forfeit it because he suffered an injury default in the semi final round. So he could not wrestle in the finals regardless if he wanted to by rules.
how did he make it to the finals if he defaut in semi did he get hurt with a illegal move
It was a semi-final match, which means the match before the finals. The kid he was wrestling, did a five point throw (which is illegal in folkystle). Kris was unable to finish the match, so he won the match by injury default. He won by injury default, because "7. INJURY DEFAULT ? 6 team points ? A wrestler wins a match by injury default when the opponent is injured accidentally during the match and cannot continue wrestling." But when he wins that match he has to forfeit any matches after that. They put that rule in to limit kids from faking an injury after an illegal move to win the match. Understand now?