Jason Bryant interviewed the man behind Mudflap awhile back. It's an interesting listen. He's just a normal fan who decided to create the persona.
Here's the interview: Link
It's BS. That guy picked it up from someone else.
College wrestling at the D1 level ranks 3rd in the state in collective attendance per event behind football and men's basketball. And it is hugely popular at the high school level, and Iowa is known around the world as wrestling country. Yet it's a fringe sport in Iowa. LOL...OK, buddy. Nationally? Absolutely. So are a lot of sports outside of football and basketball. It's OK.