WRefereeWRefereeWUmpireWBritish American Football Referees' AssociationWGyōjiWInternational Range Officers AssociationWJudge (sumo)WLimestone Umpire AssociationWMotorsport marshalWOfficial (gridiron football)WOfficial (basketball)WOfficial (ice hockey)WOfficial (tennis)WReferee (association football)WRugby league match officialsWRugby union match officialsWInternational Measurer of SailingWUmpire (Australian rules football)WUmpire (baseball)WUmpire abuse