Australians in American football and rugby union have been linked to potential NFL careers. The punting specialist position requires similar skills to those used in Australian Rules football. Salaries are up to five times higher and the position lends itself to longevity: Australian football players generally retire at around 30, whereas American football punters can play well into their 40s (in fact, one of the players listed below, Darren Bennett, played 11 seasons in the NFL after leaving behind an Australian rules career when he was nearing 30). Initially Australians sought out American football careers, although now NFL scouts are more often actively seeking
Comparison of American football and rugby union front-row forwards). Rugby teams may make up to seven substitutions. Each team must field 15 players at the start of each match. Players who are bleeding may receive medical treatment off pitch and are replaced until they have stopped bleeding. If the bleeding has not stopped after 15 minutes of "real time", the player will be permanently substituted. This can be down to officials' discretion, depending at which level the sport is played, where only minor medical assistance is needed to make the player fit to return to the field of play. Ejected players in American football can be replaced