The term 'UMPS' is an acronym for Umpires, which are officials in the sport of baseball. Umpires are responsible for making sure the game is played according to the rules and regulations, and they also make decisions on plays that are not clear-cut. Umpires are also responsible for calling balls and strikes, as well as other rulings such as fair or foul balls. Umpires are an important part of the game, as they help ensure that the game is played fairly and safely.