Teachout made her senior international debut for the United States in November 2022 in the women's welterweight event at the 2022 World Taekwondo Championships held in Guadalajara, Mexico.

[1] In June 2023, she competed in the women's welterweight event at the 2023 World Taekwondo Championships held in Baku, Azerbaijan.

[1] In October 2023, she competed at the 2023 Pan American Games and won a bronze medal in the 67 kg event.

[11][12][13] In Paris, she competed in the 67 kg event and defeated Magda Wiet-Hénin in the round of 16, but lost to eventual gold medal winner Viviana Márton in the quarter finals.

Teachout then defeated Ruth Gbagbi in the repechage match, and advanced to the bronze medal contest where she faced Song Jie.