I may be wrong as I am getting older and the memory fades, but I am not sure that Yogi said that. I do think he said “ it’s not over till it’s over”. But I’m not sure.
Remember Animal House, the movie : John Belushi: ‘Was it over when the Germans bombed Pearl Harbor?’,
Otter: Germans?
Boon: Forget it, he’s rolling.
Bluto: What? Over? Did you say ‘over’? Nothing is over until we decide it is! Was it over when the Germans bombed Pearl Harbor? Hell no...
It ain’t over now, ‘cause when the goin’ gets tough, the tough get goin’. Who’s with me? Let’s go! Come on!...(He ran to the front door but no one followed him)..
Bluto (returning): What the f—k happened to the Delta I used to know? Where’s the spirit? Where’s the guts, huh? This could be the greatest night of our lives, but you’re gonna let it be the worst.
You are correct.
Your memory is correct :)