It says they told the coach and wrestler days before that he had to wear a cover. Then they showed up to the match and had the wrong type of cover.
It's a stupid rule, but if you're gonna do a stupid sport like wrestling, you have to go by the stupid rules.
The ref should be in trouble if he let other kids wrestle with long hair, but if this is his thing (enforcing the hair rule), then I say non-issue.
But you just know half this country will be up in arms over this crap.