What happened: Chamberlain addressed the deal after it sent him from San Francisco to Philadelphia in January 1965. He said he had counseled the 76ers against acquiring him.

Why it matters: The trade stands among the NBA's landmark star moves and shaped Philadelphia's 1960s contention. It still frames debate over cost and fit when teams pursue franchise centers.

What to watch: Full accounts of the 1965 negotiations remain the reference for how the deal came together.