Mohajerani was born to Asadoolah Mohajerani and Leila Nassiri in a family of six siblings.[2] After years, his family moved to Tehran and his older brothers began playing football in Taj's youth teams. At the age of 20, Mohajerani also joined Taj SC (now known as Esteghlal) and retired after the 1969 World Military Cup held in Greece.[2]