Ed Farmer has a history with the Royals. As a pitcher with the Rangers in 1979, Farmer hit Royals outfielder Al Cowens in the face with a pitch, fracturing his jaw. Cowens would miss three weeks of action. In the same game, Farmer struck Royals second baseman Frank White with a pitch, fracturing his wrist. White would miss a month. Through a jaw wired shut, Cowens would say, "It's part of baseball, brushing somebody back. But nobody is that wild."
So perhaps Farmer has a long-standing enmity towards the Royals franchise, because as an announcer for the White Sox, he sure did not care for the current boys in blue.