Adrian "A. J." Majstrovich (born 9 February 1980) is a New Zealand-Australian professional basketball player who currently plays for the Southland Sharks of the New Zealand National Basketball League (NZNBL). He has previously played in the Australian NBL and the State Basketball League, as well as Germany, Austria and Romania. He was named the New Zealand NBL Rookie of the Year and MVP in 2003 and 2004, respectively.