Also an accomplished track athlete, Brown won a silver medal in the 110-meter hurdles at the 2013 Pan American Junior Championships in Medellin, Colombia. He lost to Colombian Juan Carlos Moreno, who established a new South American Junior record at 13.42. Brown was named to the "USA Today" All-American Track and Field Team. At the 2013 Texas Class 4A Meet, he won the state title in the 110-meter hurdles (13.63 s), and took third in the 100 meters (10.37 s). He ran a personal-best of 7.76 seconds in the indoor 60m hurdles, the fastest time in the nation in 2013. He ran a PR of 13.38 seconds in the 110m hurdles at the 2013 Texas Relays, the top time in the U.S. in 2013. He won the 110m hurdles at the 2013 USATF National Junior Olympics (13.88 s) and the USATF Junior Nationals (13.69 s). He also recorded a personal-best time of 37.32 seconds in the 300m hurdles at the 2012 Texas Class 4A Meet, where he placed first.