Why I Hate Missouri -- You Should Too

[MicroBob]

there's a real vague similarity with his voice but I just don't think it's him.

Jack's brother Bob Buck sounds like almost a carbon-copy of him and bounced around about a zillion different gigs in his career. He set things up for a cop to fake-arrest me in the middle of a broadcast I was doing once and totally freaked me out but that's a different story.
I don't think this announcer is Bob Buck either.

I've heard early recordings of older announcers before including Vin Scully, Ernie Harwell, Mel Allen, Bob Murphy, Red Barber etc and more often than not you could still tell it was them even though they sounded a bit different and obviously much younger.

However early recordings of Harry Caray do sound significantly different and if you only heard him when he was older it's difficult to tell that it is him on stuff like Bob Gibson's 18 K's in the 68 World Series for example.

I'm not saying that announcer in the basketball brawl is 100% not Jack Buck. It's possible I guess. But I just don't think it is him doing that game.