So wait, you have a sports anchor, quoting a local news article, and clearly expressing an editorial opinion.... That's bad.

But you have a "Fair and balanced" news outlet, which in fact slants its coverage to the point that it abandons all pretense of being either fair or balanced on issues. That's good.

I find both to be mistakes. The difference is that the mistake is the corner case/exception for both Costas and NBC Football. It's the rule on FoxNews.