I didn't think that was allowed by UIL???
Edit - all I have found, is this: (3) Minimum Time Between Regular Season Games. Up to and including the final district game, no team or student in any conference shall be permitted to take part in more than one game within five calendar days. Example: A team playing Saturday night cannot play again until the following Thursday night. A team playing Monday night could play any time on Saturday.
So they can play on Sunday... but the following week, they can't play until Friday (or later.)