After first being included on CSKA Moscow roster in March 2012 at the age of 15, Pomazun made his debut in the Russian Premier League for the club on 6 August 2017 in a game against FC Rubin Kazan, due to an injury to the first-choice goalkeeper Igor Akinfeev.

[3] Pomazun was injured for that game, so Georgi Kyrnats was substituted to replace Akinfeev.

[7] On 16 June 2022, Pomazun extended his CSKA contract until 2027 and returned to Ural on loan for the 2022–23 season.

[8] On 3 July 2023, Pomazun extended his CSKA contract until 2028 and returned to Ural on his fourth loan.

[10] Pomazun was called up to the Russia national football team for the first time in March 2023 for a training camp.