Because the refs need to stop the game and tell everyone
In all stages of football, the clock is stopped for incomplete passes.
It is because it is ruled an incomplete pass and therefore time stops.
After first down, after incomplete pass, when player goes out of bounds a timeout
If you are reffering to soccer/football no. If you are talking about american football, not really. Both sports have a concept of moving a football down the field without getting tackled and for the most metres excrpt ruby has no amount of downs, you can only pass backwards and the clock doesn't stop after each incomplete play. The play in rugby is continuous meaning you don't stop after each play but have to win the ball in the ruck and set up your next move, (its complicated to explain).
Even after a penalty, the clock stops only when the play is over.
Not anymore. It used to.
as soon as the ball hits something.
look at my statistics
yes it is true that a referee must stop the clock by going out of bounds in the last 2 minutes of a football game. no-one knows why they were told to do this but now the rules have changed.