Renowned soccer journalist Grant Wahl has died, the U.S. Soccer Federation reported Friday. Wahl, 49, was in Qatar covering the World Cup when he passed away. Wahl's agent, Tim Scanlan, said that the journalist "appeared to have suffered some sort of acute distress in the press room" of the stadium during the quarterfinal match between Argentina and the Netherlands, when the two teams began playing in extra time. Paramedics were called to the scene, Scanlan said, but were unable to revive him.  Qatari officials said in a statement that Wahl "received immediate medical treatment on site, which continued as he was transferred by ambulance to Hamad General Hospital." The exact cause of death is not yet known.  Wahl had been tweeting during the match, which was part of the eighth World Cup he had covered.     "The entire U.S. soccer family is heartbroken to learn that we have lost Grant Wahl," the U.S. Soccer Federation said in a statement Friday night. "Fans of soccer and journalism of th