引用元: トム・チェンバース – Wikipedia.
Before 1988, you could be drafted or traded. Signing with another team after your contract was up, however, was not the wide-open option it is today. Even if your team was willing to let you go, they had to receive compensation.
In short: if you were good, chances were you weren’t going anywhere.
“There was no such thing as free agency,” Chambers said. “If a team had you, then you had to sign with that team unless they traded you. You really couldn’t move. There was no movement at all. Therefore, contracts were kind of locked into what you could make.”
>Days later, it became official. Players whose contracts had concluded would be truly free to choose their teams if they met two conditions:
1) have been in the league seven years or more and
2) have played through two NBA contracts.
As a player who met both requirements and whose talents would be in high demand, Chambers, it turned out, would be the perfect pioneer for the NBA’s new frontier of free agency.
引用元: The Impact of Tom Chambers and Unrestricted Free Agency | Phoenix Suns.
Chambers Tom Chambers, the first unrestricted free agent in NBA history, signed with Phoenix on July 5, 1988 and helped transform the Suns into instant title contenders.
引用元: SUNS: Tom Chambers.