3 actual New York Knicks during the time of filming had a cameo during the playground pickup scene.... John Starks, Anthony Mason, and Herb Williams all appeared during the pickup scene in the playground.
Kurt Rambis the current New York Knicks coach (2015-16) portrays the Lakers head coach in the film. He did go on the coach the Lakers on an interim basis in 1999 but was only an assistant coach at the time of filming.
While the Knicks have been one of the worst teams in the NBA, at the time of the release they were considered to be one of the best. Although the movie portrayed them to be the worst the real life Knicks had just appeared in the NBA Finals 2 years prior to the films release in 1994