Category talk:World Champions By Weight Class
Were vacant titles at stake in inaugural title fights?
Were the WBA and WBC titles vacant when being at stake in inaugural title fights in the light heavyweight, welterweight, light welterweight, lightweight, super featherweight, featherweight, bantamweight and flyweight divisions? Was the IBF title vacant when being at stake in inaugural title fights in the light heavyweight, middleweight, welterweight and light welterweight divisions? The wiki lineages do not count inaugural title fights as defenses although those fights are not marked vacant in BoxRec.