I believe the wrestler your Grannie watched was Whipper Billy Watson. He was a Canadian professional heavy weight champion.
Montana Gramma wrote:
We did not have a tv until I was 10 and then Dad won it in a raffle and we had to wait til he got the money for an antennae. But Grannie had one and I think it was watching Whipper Billy Robinson wrestle. We rarely watched tv , we were outdoor kids and it was only turned on in the evenings for Dad to watch the news and Alfred Hitchcock, that kids could not see. Pretty mild compared to shows now. They did not want us to have nightmares!