Fair catch catch is called a "mark"; see mark (rugby) and mark (Australian football) for more information (however in Australian Rules Football the player is not protected from the opposition team while attempting a mark). Fair catches featured in some extinct forms of football, and they have been abolished in other modern codes. In Rugby league the defensive player attempting to catch the ball cannot be tackled whilst in the air, though the attacking players can contest the ball by attempting to catch it themselves. A player who successfully catches the ball is able to be tackled only once they have landed
Comparison of Canadian football and rugby union running backs, receivers, and quarterbacks have roles similar to backs in rugby. Because of the playing time, number of pauses, number of players and the nature of the game in general, rugby players will typically need higher physical endurance than Canadian football players while more short-term bursts of physical strength, power, and speed are required in Canadian football (amongst equivalent positions and weights). Collisions between players in rugby union tend to last significantly longer than Canadian football, in which collisions are more often "hits" in which the momentum of the player is enough to bring the other player to ground