The term 'ONE WHO KNOWS THE SCORE' can be broken down into two words: MAESTRO (7 letters) and Sportscaster (12 letters). A MAESTRO is a person who is highly skilled in music, usually a conductor or composer. They are responsible for leading an orchestra or choir and ensuring that the performance is of the highest quality. A Sportscaster is a person who reports on sports events, providing commentary and analysis. They are often seen on television or radio, and they provide viewers with up-to-date information about the game. Both of these roles require a deep knowledge of the subject matter, making them perfect candidates for the term 'ONE WHO KNOWS THE SCORE'.