Diego Maradona, mad genius on the soccer field, madman off it, would seem to be an absurd choice to coach Argentina's team in the World Cup.<p/> Maradona, a former cocaine addict who weighed an obese 240 pounds before stomach-stapling surgery, often juggles the ball on the sideline during games. Or he's an emotional wreck, his face contorting operatically. After Argentina scored against Peru in a qualifying match, Maradona dove into a belly slide on the wet grass.