At the end of the 2014–15 season, Ezatolahi chose not to sign with Atlético Madrid B and on 21 July 2015, Ezatolahi joined international teammate Sardar Azmoun at Russian Premier League club Rostov with a four-year contract.
Due to Visa issues, he could not play for Rostov until 2016 and in January 2016 Ezatolahi's Visa issues were resolved.
He made his debut for the club on 2 February 2016 playing in a 3–0 friendly win against Chinese side Jiangsu Sainty.
Ezatolahi scored his first goal for Rostov on 27 February 2016 in a 2–0 friendly win against Norwegian side Stabæk.

Ezatolahi made his first team debut for Rostov on 12 May 2016 in a 3–1 victory against FC Dynamo Moscow.
At the end of the 2014–15 season, Ezatolahi chose not to sign with Atlético Madrid B and on 21 July 2015, Ezatolahi joined international teammate Sardar Azmoun at Russian Premier League club Rostov with a four-year contract. Due to Visa issues, he could not play for Rostov until 2016 and in January 2016 Ezatolahi's Visa issues were resolved. He made his debut for the club on 2 February 2016 playing in a 3–0 friendly win against Chinese side Jiangsu Sainty. Ezatolahi scored his first goal for Rostov on 27 February 2016 in a 2–0 friendly win against Norwegian side Stabæk.
Ezatolahi made his first team debut for Rostov on 12 May 2016 in a 3–1 victory against FC Dynamo Moscow.
Saeid Ezatolahi