The 1999–2000 NBA season was the Lakers' 52nd season in the National Basketball Association, and 40th season in Los Angeles. It was also the Lakers first season playing in their new arena, the Staples Center, becoming co-tenants with their crosstown rival, the Los Angeles Clippers. During the off-season, the team re-acquired former Lakers forward A. C. Green from the Dallas Mavericks, and signed free agents Ron Harper, Brian Shaw and John Salley. Green won two championships with the Lakers in the 1980s, and Salley won three championships with the Detroit Pistons and the Chicago Bulls. More significantly, the Lakers hired former Bulls coach Phil Jackson, who would go on to help the team win five NBA championships over the course of the next 12 years.