Complex sentence: Leon Lett, Jr. (born October 12,1968), nicknamed The Big Cat, is a former American football defensive tackle and coach who currently serves as the assistant defensive line coach for the Dallas Cowboys in the National Football League (NFL).
Split into simpler sentences: Leon Lett, Jr. (born October 12,1968) is a former American football defensive tackle and coach. He is the assistant defensive line coach for the Dallas Cowboys in the National Football League (NFL).