No there isn't a record of cash betting. Why would there be?
Did he ever claim to be? If so please link to where.
I mean, as I have said, before the past couple years, I always though a professional sports bettor was someone who handicapped games and was able to win at a 54-55% rate to beat the vig. But apparently there are so many other things a player can do to gain an advantage. Red has always said he specialized in college football contests. I didn't know a person could do that for a living, but there is so much I don't know.