In terms of my work with Nike, obviously signing Michael Jordan to a $500,000 contract in 1984 set a new precedent for the business side of the game.
After the NBA and ABA merged, players could come out after high school. Still, there were only a few cases prior to Kevin Garnett coming out in 1995, so Nike and the other companies were only involved in the college game.
Beginning in 1978, Nike paid coaches to put their shoes on the team.