a little background before you listen to it...
During rain delays in Cincinnati, Marty and Steve (the radio announcers) take phone calls from fans on what is called "The Banana Phone"
Well, Adam Dunn called up a couple of weeks ago from the dugout acting as "Adam in Milwaukee" He changed his voice so Marty wouldn't notice it was him, and he acted stupid to make people laugh. Apparently he was in the dugout with some teammates and they were just having a good time. Hilarious!
(Marty didn't know who it was until halfway through the call. He says "our good friend in ... a lot"