Complex sentence: Dwight Muhammad Qawi, who became a two-time world champion after leaving Rahway and James Scott, who was a title contender and had many bouts inside the prison itself, including a fight against Qawi in 1981.
Split into simpler sentences: Dwight Muhammad Qawi became a two-time world champion after leaving Rahway. A contemporary of Qawi, James Scott, was a title contender of the same era who fought many times inside the prison itself, including a fight against Qawi in 1981.