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Emmet Also there was a sort of ownership that the clubs had over players back then that made them stay. Players were tied to their
labor contracts, they had to have their saying or they couldn't leave. Or... they could and good luck finding another career somewhere else.
So even though his regular contract would run out every 3 years or so, he was pretty much like a property, a patrimony owned by Santos institution. Some might call this "slavery" but i've never heard of a slave making that much money.
Decades later FIFA did something about it and coincidentally asked Pelé for the rights to use his name.
http://en.wikipedia.org/wiki/Pelé_Law
"The Pelé Law is a Brazilian law that forces professional sports clubs to observe business law and pay tax within two years.
On March 24, 1998, Law N. 9.615/98, stipulates that by 2001 clubs can sign a maximum five-year contract with a player when he turns 16 and stand to receive only a "penalty fee" of up to 100 times his monthly wage if he leaves before then.
If a player fulfills the contract without renewing then he can leave and join a new club as a free agent. The previous club receives no transfer fee or compensation in this transaction with his new club."
All in all, the only way Pelé could leave is if the club allowed him to. And they did, but only when he was older and close to the end of his career.