She started training in jiu-jitsu after watching Pride Fighting Championships and Pancrase events.
She took up Muay Thai later and transitioned to mixed martial arts as few kickboxing competition events could be found in Texas.
[3] Simpson made her promotional debut on July 29, 2016, at Invicta FC 18: Grasso vs. Esquibel against Simona Soukupova.
[5] Her next fight came ten months later on May 20, 2017, at Invicta FC 23: Porto vs. Niedzwiedz against Herica Tiburcio.
[7] On December 8, 2017, Simpson faced Amber Brown at Invicta FC 26: Maia vs.