High school athlete Mack Beggs, a teenager who is transitioning from female to male, won his 110-pound (50-kg) weight class in the Texas girl's state championship Saturday, according to media reports.

Beggs, 17, and many of his opponents want him to wrestle against boys, but the transgender boy wrestled in the Texas championship for girls because of state sport regulations, which require athletes to compete according to birth gender.

The wrestler, a junior at Trinity High School in the Dallas suburb of Euless, had a 52-0 record ahead of the weekend tournament and was favored to win the 110-pound weight class in the championship.