The suggestion was made by Keiva in the Misc. thread that this sounds like a Dizzy Dean expression. I can also easily imagine it coming from Satchel Paige. He also opines that the expression could have gone either way, from the song/dance to sports or vice versa. Since the possibilities are so close chronologically further research is needed to pin it down one way or the other. I respectfully submit that hearsay evidence is unreliable, even if from people alive at the time. Someone may have noticed it first in a secondary context and have assumed it to be the primary source.