Marcelo Alberto Bielsa Caldera ([maɾˈθelo alˈβeɾto ˈβjelsa], nicknamed El Loco Bielsa [ˈloko ˈβjelsa], meaning "The Crazy Bielsa"; born 21 July 1955) is an Argentine professional football manager who was most recently the head coach of Premier League club Leeds United. He is a former player and played as a defender for Newell's Old Boys, Instituto and Argentino de Rosario.
