AUSTIN, Texas (AP) — When transgender wrestler Mack Beggs won a girls' state championship, his victory drew jeers and complaints that his steroid therapy treatment had given him an unfair advantage against girls who risked injury just by getting on the mat with him.

Now Texas lawmakers are pushing a bill that could ultimately deny Beggs, a Dallas-area junior, a chance to defend his title next year.

The proposal working its way through the Legislature would require transgender students like Beggs to turn over their medical information to the University Interscholastic League, the state's govern...