I think it may be the first instance of Samuel L Jackson as Samuel L M Jackson. His earlier parts through IMDB are either surprisingly Good Guy (Loaded Weapon and Jurassic Park), never heard of/can't find information/blaxploitation/Troma, or Unnamed Token Black Man roles (continues after Pulp Fiction, even...) such as Gang Member, Holdup Man, or Black Guy. So... not his first lead role but apparently the first where he has your attention.