The 1989–90 NBA season was the Bulls' 24th season in the National Basketball Association, despite their solid playoff run last year, the Bulls fired head coach Doug Collins and replaced him with who, a former American professional basketball player, coach and executive in the National Basketball Association (NBA)?
1989–90 Chicago Bulls season:  Despite their solid playoff run last year, the Bulls fired head coach Doug Collins and replaced him with Phil Jackson. Phil Jackson: Philip Douglas Jackson (born September 17, 1945) is a former American professional basketball player, coach and executive in the National Basketball Association (NBA).
Phil Jackson