I doodled a rabbit that looked Baker-y in the eye area.
So the popular theory is that it's his father. Who was a wrestler. Here they are at how I see them looking at around the same age (late 30's early 40's)
However, totally not canon. And chances are I won't doodle him again. Whoops!
Link
Orobilly
It was still a fun concept at the time. Shame I couldn't be there to watch the whole thing.