Born February 14, 1989 Byron Mullens played in the NBA mainly as a Centre during their playing career, season(s): 2010-2014. Byron James "B. J." Mullens is a British-American professional basketball player for the London Lions of the British Basketball League. He also holds British nationality due to his English mother. He was drafted 24th overall by the Dallas Mavericks and immediately traded to the Thunder in the 2009 NBA draft.