Mack Beggs, a 17-year-old wrestler who identifies as male, has won a Texas state title in girls wrestling, overcoming jeers from the crowd en route to a controversial championship.

The victory was contentious in part because Beggs is taking testosterone as he transitions from female to male, which some claimed gave him an unfair advantage.

“She’s standing there holding her head high like she’s the winner. She’s not winning. She’s cheating,” said Patti Overstreet, the mother of another wrestler, according to the Washington Post. “It’s not equal. It’s never going to be equal.”