Known for his relentless fighting style, formidable punching power, stamina, and exceptionally durable chin, Marciano has been included by boxing historians in lists of the greatest boxers of all time, and is currently ranked by BoxRec as the 21st greatest pound-for-pound boxer in history. Five of his victorious fights received a 5-Star rating from BoxRec. Marciano remains the only fighter to have stopped every opponent he's ever faced for the world heavyweight title, and holds the highest knockout-to-win ratio in world heavyweight title fights at 85.7%. His career knockout-to-win percentage of 87.8% remains one of the highest in heavyweight boxing history.