Comparison of American football and rugby union possession of the ball at their own 20-yard (25 yard line in College Football) line. An important difference between the two sports involves the aftermath of a score. In American football, the scoring team kicks off, except after a safety. In rugby union, the team conceding the score kicks off (in rugby sevens, a variant of rugby union featuring seven players per side, the scoring team kicks off). An American football team consists of an offensive unit, a defensive unit and a "special teams" unit (involved in kicking and kick returns). Only eleven players can be on the field at
United States national American football team national team was selected to encompass a cross-section of amateur football in the United States, and as such USA Football used strict criteria to select team members. This does not permit the top American football players in the United States to compete as the restrictions include: These criteria are applied to make international tournaments more competitive. The United States competed for the first time in the 2007 IFAF World Cup. The team's first ever game was a 77–0 smashing of South Korea in the first round of the tournament. The Team USA defense set an IFAF all-time tournament record in