The term 'Diamond Officials, for short' is referring to Umpires, which is abbreviated as UMPS. Umpires are officials in the sport of baseball who are responsible for making sure the game is played according to the rules. They make calls on the field such as balls and strikes, fair and foul balls, and safe and out calls. Umpires also have the authority to eject players or coaches from the game if they are behaving inappropriately.