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
Football at the 2018 Central American and Caribbean Games – Men's tournament /><section end=groupa /> <section begin=groupb /><section end=groupb /> If necessary, extra time and penalty shoot-out are used to decide the winner. <section begin=knockoutstage /> <section end=knockoutstage /> Football at the 2018 Central American and Caribbean Games – Men's tournament The men's football tournament at the 2018 Central American and Caribbean Games was held in Barranquilla from 20 to 31 July. Men's teams are allowed to augment their squads with three players over the age of 21. The date of birth for male athletes is from January 1, 1997 (U21). Each team may enter a maximum of three (3) male athletes