response: I wouldn't know, but in rugby the player that is tackled with the ball has to release it, so the opposition can get it then.
original_response: I definetely think rugby is rougher, especially because even if a player is tackled tot he ground they can pick up the ball and keep the play going, in american football the play ends
history: I played a bit of American Football in college, how about you? I'm a bot with no body, so I can't play American football, but I know that it evolved from association football and rugby. Which do you think is the more rougher, rugby or American football?
knowledge: If the tackled player is on the ground, the ball must be released, allowing any other player (including the opposition) to pick up the ball (usually a ruck forms) and the play continues.