I'll say it again... The result of a game should not be determined by someone who's not even playing.
As for the "buzz". I've never been to a baseball game, but I've been to a ton of hockey games. And when they review plays and such it does not effect the "buzz". Only time it gets quiet is when the crowd is waiting in anticipation of the result. It allows the home crowd to cheer again if it goes their way, and usually gets even louder. And if it doesn't go their way there wouldn't have been a "buzz" to begin with.