[1] He won the gold medal in the 87 kg event at the 2023 Pan American Games held in Santiago, Chile.

Grégorich won the gold medal in the 87 kg event at the 2018 Central American and Caribbean Games held in Barranquilla, Colombia.

[3] At the 2019 Pan American Games held in Lima, Peru, Grégorich won one of the bronze medals in the men's 87 kg event.

In the same year, he competed in the 87 kg event at the 2019 World Wrestling Championships held in Nur-Sultan, Kazakhstan without winning a medal.

[1] Grégorich won the gold medal in his event at the 2024 Pan American Wrestling Championships held in Acapulco, Mexico.