After his heart attack in 1974 Herrera retired from football .
After his heart attack in 1974 Herrera did not return until March 1979 when Serie B club Rimini Calcio called upon his services and gave him the role of consultant .
After his heart attack in 1974 Herrera retired from football and did not return until March 1979 when Serie B club Rimini Calcio called upon his services and gave him the role of consultant .