The recording is by the Harry Simeone Songsters. I know the Chicago Cubs also used it to kick off their radio broadcasts in the '60's. Simeone was best known for his work with the Harry Simeone Chorale, mostly Christmas carols and such. The song is available on the Baseball's Greatest Hits Let's Play II CD. Amazon has it, but it's not cheap.
"Look at it, man", he said as if he had read my thoughts. "they call it America, and they call it civilization, and they call it television, and they believe in it and salute it and sing songs to it and eat and sleep and die still believing in it, and---and---I don't know", he said, taking another drag, "then some time the Mets come along and win the World Series___" Gram Parsons, quoted by Stanley Booth in Dance With The Devil