Longtime sportscaster and NBC host Joe Garagiola supplied an on-camera set-up to the background for the story’s premise of envy of the successful New York Yankees team.
It was recorded at NBC's Brooklyn Studios and “colorcast“ on April 8, 1967 as a production of a relaunched General Electric Theater which ran from the late 1960s into the early 1970s.
Note: All the principal cast were singers, so they could all supply their own vocals for the soundtrack without being dubbed.
References
^Devilish Difficulties Pursue 'Damn Yankees': With Club in 10th, Plot of TV Musical Needs Explaining Once Upon a Time, Beating New York Was a Fantasy By Leonard Koppett. New York Times 26 Feb 1967: S3.
^TV: New ‘Damn Yankees’; Kirk Browning’s Version of Musical Employs a Mixture of Staging Forms, by Jack Gould. New York Times, 10 Ap. 1967: 71.
^The Cleveland Press, TV Showtime, Apr. 7-14, 1967, cover art.