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Well, I guess it's possible if not likely at all if an adventurous-minded norse sailor sails south enough along the coast of NA and through insane luck manage ends up somewhere near mesoamerica (maybe with the Maya) during what would be the Classical Period (pre-1000), weirder things have happened in history.
But what would be the consequences of such a meetup? Are the mesoamericans ravaged by diseases some 500 years earlier? Hypothethically.