The NFL has proposed playing two regular-season games outside the United States starting in 2008, league officials said. Mark Waller, head of NFL international development, said the proposal to play abroad was put to team owners in Denver. It came after the 49ers and Cardinals played last October before a regular-season record crowd of 103,000 in Mexico City. The owners will discuss the issue again in October. The games would be played in Mexico, Canada, the United Kingdom and Germany, where five of the six NFL Europe teams play.