Fair catch kick rugby have eliminated the rule; rugby league abolished the goal from mark in 1922, and rugby union removed it in 1977. Australian rules football has retained the rule, and it is a vital part of the Australian game; a "fair catch" of a ball kicked more than 15 metres in the air is called a "mark", and the player making the mark is then awarded a free kick. The fair catch kick has been present in the National Football League (NFL) rulebook since the league's inception, and also remains in the National Federation of State High School Associations (NFHS) rulebook.
Comparison of American football and rugby union can play equally well in a variety of positions and most will play in the same position from youth. Every position in rugby has its own unique name (except for number 8) and associated skill base. In most club and schoolhouse American Football, the majority of players play both offense and defense, only being substituted for injury. Substitutes in American football can return to the game at any stoppage in play. In rugby union, any player substituted off for any reason, except for a 'blood' injury, is prohibited from returning to the field of play (with the possible exception of