Complex sentence: Stevens was regarded as a hero by the band due to his time in Los Olvidados, a band that was held in high regard as the "kings" of the San Jose punk scene although they had never released a proper album at the time.
Split into simpler sentences: Stevens was regarded as a hero by the band due to his time in Los Olvidados. A band that was held in high regard as the "kings" of the San Jose punk scene although they had never released a proper album at the time.