In 2019, Mirzazadeh represented Iran at the Military World Games held in Wuhan, China and he won one of the bronze medals in the 130 kg event.

[4] In 2020, Mirzazadeh won the gold medal in the 130 kg event at the Asian Wrestling Championships held in New Delhi, India.

[7][8] In August 2021, he lost his bronze medal match against Rıza Kayaalp of Turkey in the men's 130 kg event at the 2020 Summer Olympics held in Tokyo, Japan.

[11][12] In April 2023, he won the gold medal in his event at the 2023 Asian Wrestling Championships held in Astana, Kazakhstan by defeating Meng Lingzhe.

[14] In April 2024, Mirzazadeh won the gold medal in his event at the Asian Wrestling Championships held in Bishkek, Kyrgyzstan.