I know people get down on Rock, and I'm not the world's biggest fan, but man are there some bad color guys around the league. John Kruk is awful. Between him and the White Sox lead commentator, I have no idea how these positions are distributed.
We're spoiled. Ueck is a legend, BA is great, Levering and Grindl are good to very good on the radio side, and Mauer and the rest of the TV crew are generally fine. I think Dillard and Rottino are generally subpar, but compared to the other guys I hear daily, they're like borderline Steve Stone (who's one of my favorite broadcasters of all time).