First father v son NBA match

The first time in NBA history a father coaching one team faced his son playing for another was when New York Nets (USA) rookie Jan Van Breda Kolff (USA) produced six points and four rebounds against the Utah Jazz (USA), coached by his father, Butch Van Breda Kolff (USA), on 9 November 1976. The only other NBA father-versus-son combination is between Los Angeles Clippers (USA) coach Mike Dunleavy Sr. (USA) and Golden State Warriors (USA) forward Mike Jr. (USA) The Dunleavys have faced one another eleven times through January 2006.