DALLAS (AP) — A transgender boy who won a girls wrestling state title in Texas says he would compete against boys if allowed and is taking lower doses of testosterone to try to be fair to his opponents.

Mack Beggs said in an interview that aired Sunday on ESPN that he competes against girls only because the state’s governing body for public high school sports requires him to wrestle under the gender listed on his birth certificate.

Asked if he was taking the amount of testosterone he wanted while transitioning to male, Beggs said he was “holding back because of wrestling.”

“I want to do it fairly,” he said. “I don’t want to cheat. That’s not something I do. I don’t cheat.”

The 17-year-old Beggs won the 110-pound girls title as a junior at Euless Trinity High School in the Dallas-Fort Worth area. He could face a legal challenge during his senior wrestling season.

University Interscholastic League rules allow Beggs to compete while taking testosterone, but school superintendents and athletic directors voted overwhelmingly last year on the gender requirement.

FILE – In this Friday, Feb. 24, 2017, file photo, Mack Beggs, right, a transgender wrestler from Euless Trinity, competes in a quarterfinal against Mya Engert of Amarillo Tascosa during the state wrestling tournament in Cypress, Texas. Beggs, who won a girls wrestling state title in Texas, says he would compete against boys if allowed and is taking lower doses of testosterone to try to be fair to his opponents. (Melissa Phillip/Houston Chronicle via AP, File)

http://aimmedianetwork.com/wp-content/uploads/sites/47/2017/03/web1_115372183-9b79524a74cc4fbeb56e4c8a8d90402e-1.jpgFILE – In this Friday, Feb. 24, 2017, file photo, Mack Beggs, right, a transgender wrestler from Euless Trinity, competes in a quarterfinal against Mya Engert of Amarillo Tascosa during the state wrestling tournament in Cypress, Texas. Beggs, who won a girls wrestling state title in Texas, says he would compete against boys if allowed and is taking lower doses of testosterone to try to be fair to his opponents. (Melissa Phillip/Houston Chronicle via AP, File)

FILE – In this Feb. 18, 2017, file photo, Euless Trinity’s Mack Beggs is announced as the winner of a semifinal match after Beggs pinned Grand Prairie’s Kailyn Clay during the finals of the UIL Region 2-6A wrestling tournament at Allen High School in Allen, Texas. Beggs, a transgender boy who won a girls wrestling state title in Texas, says he would compete against boys if allowed and is taking lower doses of testosterone to try to be fair to his opponents. (Nathan Hunsinger/The Dallas Morning News via AP, File)

http://aimmedianetwork.com/wp-content/uploads/sites/47/2017/03/web1_115372183-28c5919c09a14c7ba8745e502bc05825-1.jpgFILE – In this Feb. 18, 2017, file photo, Euless Trinity’s Mack Beggs is announced as the winner of a semifinal match after Beggs pinned Grand Prairie’s Kailyn Clay during the finals of the UIL Region 2-6A wrestling tournament at Allen High School in Allen, Texas. Beggs, a transgender boy who won a girls wrestling state title in Texas, says he would compete against boys if allowed and is taking lower doses of testosterone to try to be fair to his opponents. (Nathan Hunsinger/The Dallas Morning News via AP, File)