Not necessarily.
They are called substitutes.
no
You have to start early, and show interest in the game, to impress the scout, having pace will help you.
If the team runs out of goalkeepers, they will have to send on a substitute outfield player to have a go. If they have ran out of substitutions, they have to send a player who is already on the pitch in. They have to put the keeper's shirt on, and his gloves.
sub
No. Once a player is substituted for, they may not reenter.
No, rugby was invented during a game of soccer or as i say it football.
Only if he scores a hat trick.
Bannana's
Yes.
A lot.
Soccer players are usually in extremely good shape because of the physical demands of their game. As of 2014, the heaviest soccer player is unknown.