Corey Provus does a very good job of this. Dan Gladden does a very poor job of this.
I agree Corey Provus is good radio guy.If you ever got to listen to Vin Scully he was the best and understood the difference when he was on radio than when he was on TV.If you ever listen to teams that are cheap and only have one crew, like Pittsburgh does, their radio broadcasts are the worst.This is because they are doing TV and the radio just picks up the feed, so when they say things like "and you can see there," or "if you look here" which no I cannot because I am listening on the radio.You need to tell me what is going on.
Also, when on radio you cannot have dead air or people will think they have lost feed, so you need to keep talking.Scully would transition between stories and the game like none other.