That's new to me but it's true -- Mother's Day 1973 in San Diego.
Was this match ever publicized or televised???
It certainly wasn’t publicized to the same extent as the one against King. And if this article is anywhere near the truth, the prior match merely was a set-up for a big payday for the fixed match against King: http://espn.go.com/espn/feature/story/_/id/9589625/the-match-maker