The term 'Strike Caller, for short' is an abbreviation for the job of Umpire, which is a three letter acronym. An umpire is an official in a variety of sports who is responsible for making decisions on the field or court. They are responsible for enforcing the rules of the game and making sure that all players abide by them. Umpires also have the authority to call strikes, balls, and other infractions during the game.