High Quality Content by WIKIPEDIA articles! In professional boxing, the lineal championship of a weight class is a notional world championship title. It is initially held at some moment in time by a boxer universally acclaimed as the best in the class. Another boxer can win the lineal championship only by defeating the reigning lineal champion in the ring. The lineal champion is described as "the man who beat the man". There is no single canonical list of lineal champions at any weight class, because there is no agreed method of what to do when the current champion retires or moves to a different weight class.