Marcelo Alberto Bielsa Caldera (nicknamed Loco Bielsa English: Madman Bielsa; born 21 July 1955) is an Argentine football coach . Bielsa has managed football clubs and also the national teams of Argentina and Chile. In Chile, he achieved cult status due to the improved results of the national team under his leadership. His personality and gestures during his stance in Chile captured the attention of media and unleashed a series of minor controversies both in sports and politics. On 8 August 2015, Bielsa resigned as Marseille's coach.