If there were a specific segment on "How the Media Covers Sports" it would have been fine in that context. I believe he was being deliberately provocative--perhaps he was acting out because of the pressure of the imminent oxycodone story.
You're right. None of the other ESPN commentators discuss race -- NOT! I hear it constantly. Why are you suggesting the Rush should have been an exception? Because he's a conservative? Funny... that's what the liberal media thinks, too: conservatives should never talk about race.