A player is "capped" for each international match played. Some "friendly" games also count. A player who has played in 50 international matches has fifty caps.
The origin
It stems from the old days when the players were issued commemorative "caps" for the game; the term has simply continued, although the actual caps are no longer provided to the players.
See related link, "International cap", for a photo of a cap.
They are mainly given for International matches. When a player plays for their country, they win a cap. Interestingly, the players actually receive a cap, i have attached a link of a cap, they still have this style today.
A cap is how many times the player has appeared in a game.
No because there is no salary cap.
yes
Uruguay won the world cup in 1930.
any hand cap
What do you mean by "Who likes play soccer?"
If you mean "How do you SAY soccer in Japanese?", then the answer is "sakkā".
past the soccer ball
The cap is a retro cap and it stands for Milwaukee
soccer? don't you mean football? soccer isn't played in the UK
it mean help