In his case, it describes him as a girl, even though he started making the transition from female to male in freshman year.
"You put me in front of anybody and I'll wrestle them", Beggs said.
Both the NCAA and the Olympics have rules in place that allow athletes to compete as the gender they identify with. His victory in the Class 6A 110-pound division on Saturday elicited mixed reactions.
Last year - as well as this year - Beggs fell under the exception because her performance-enhancing testosterone hormone therapy was prescribed by doctors for "valid medical purposes' ... meaning that - unlike other competitors who did not enter as transgender - her steroid use was not barred from the state championships".
Beggs also told the Morning News that he knows he's a champion and that he worked tirelessly to achieve his consecutive state titles. Cypress Ranch High senior Kayla Fitts, who was 52-0 this season until she faced Beggs in the state semifinals, told the Dallas Morning News that allowing Beggs to compete was unfair. The University Interscholastic League requires student-athletes to participate under the sex noted on their birth certificate.
"The UIL is not in the gender-determining business and schools don't want to be either", UIL deputy director Jamey Harrison told the Associated Press.
"I wanted to come out on top, and in my heart-I feel like a champion", Beggs said.
His mom, Angela McNew, said that Beggs isn't trying taking advantage of the girls he is forced to wrestle simply to have an easier path to a state title. "People think Mack has been beating up on girls. It has more to do with skill and discipline than strength".
"It sure as hell didn't stop me from doing what I wanted to do in the past, and it won't stop me from what I want to do in the future. It all comes down to technique and who has the most heart". To help with the process, Beggs underwent low-level shots of testosterone. It states that the state's high school athletics organization, the University Interscholastic League, can "declare a student ineligible for competition on the basis of steroid use" even if the student is taking the substances for "a valid medical objective". "That didn't stop me from being who I was", he said. "This is what I worked for".