In 1978, Stern left Proskauer Rose to become the NBA's General Counsel under Commissioner Larry O'Brien. By 1980, O'Brien promoted Stern to be the NBA's executive vice president for business and legal affairs, which made Stern de facto in charge of marketing, television, and public relations for the league. During this time, Stern largely drove two landmark agreements with the NBA Players' Association: drug testing and team salary cap. An August 1980 report by the Los Angeles Times had estimated that 40 to 75 percent of NBA players used cocaine. The drug testing policy dealt with the perception that the NBA had a drug problem, which it admitted, and it was cleaning it up. The NBA was the first of the major sports leagues in North America to implement a drug testing policy. The salary cap created a revenue-sharing system where owner and player were effectively partners, with players receiving 53 percent of all revenues. Both of these agreements solidified Stern's standing inside NBA circles.