Complex sentence: He brought so much enthusiam to the game that no one ever knew if he was really rooting for the Canadiens because he showed no favoritism what so ever in is tone of voice, which made him such a professional sports announcer.
Split into simpler sentences: He brought so much enthusiasm to the game that no one ever knew if he was really favouring the Canadiens. He showed no favoritism what so ever in is tone of voice which made him such a professional sports announcer.