Referee
person of authority, in a variety of sports, who is responsible for presiding over the game from a neutral point of view
official (ice hockey)
baseball umpire
cricket umpire
basketball official
chess arbiter
Umpire
Fifth Official
video assistant referee
rugby union match official
tennis umpire
field hockey umpire
technical specialist
official
American football official
wrestling referee
futsal referee
Australian rules football umpire
association football referee
gamemaster