Rubuta ci gaba don wannan sakin layi - Ya zama kocin Cardiff City a watan Nuwamba 1973, amma a watan Afrilu 1974 ya bar mukamin kocin tare da tawagar 'yan wasan Iran. Ya fara aikinsa tare da nasara bakwai a jere, yana jagorantar su zuwa lambar zinare a Wasannin Asiya na 1974
da kuma cancantar gasar Olympics ta Montreal. A watan Janairun 2006, an gayyaci O'Farrell zuwa Iran don halartar wani biki don girmama tsoffin 'yan wasan Persepolis, tare da Alan Rogers.