Outside of Ken Harrelson of the Chicago White Sox and John Sterling of the New York Yankees, there are plenty of other baseball announcers who have no problem letting their home team bias shine through.
I do understand how this list could be controversial since, with the exception of maybe Vin Scully of the Los Angeles Dodgers, every baseball commentator is a little biased towards his or her own team.
However, some commentators show their bias a little more than others. And as a baseball fan, I know there is nothing more frustrating than listening to a subjective announcer blatantly root for his or her favorite team.
Here's a list of the 20 worst perpetrators of biased commentating.