[3] Heathcock represented Germany at the 2022 Junior World Championships and won a gold medal in the individual sabre event.

[1] In April 2023 he represented the United States at the 2023 Junior Fencing World Championships and won a gold medal in the individual and team sabre events.

[5] In June 2023 he represented the United States at the 2023 Pan American Fencing Championships and won a gold medal in the team sabre event.

[9] At 18 years old, he became the youngest ever men's sabre fencer to win multiple senior level international competitions in a season.

[10] In April 2024 he represented the United States at the 2024 Junior Fencing World Championships and won a gold medal in the team sabre event.