I'm agreeing with the suggestion above on the Argentina gold medal in the Olympics. That, in mind, was the sign and symbolic moment that basketball really became an international sport, that an non-American team could raise a team of players to take the gold.
And the growth of BuzzerBeater I think echoes that notion.
Don't ask what sort of Chunks they are, you probably don't want to know. Blowing Chunks since Season 4!