Game callers are an important part of any sporting event. Umpires (UMPS) and referees (REFS) are two types of game callers who are responsible for making sure the rules of the game are followed and that the game is played fairly. Umpires are typically found in baseball, softball, and cricket games, while referees are usually found in basketball, football, and hockey games. Both umpires and referees have the authority to make decisions on the field or court and to enforce the rules of the game.