St. Jago had Nickel Ashmeade and Yohan Blake. Poly had Bryshon Nellum on anchor.
Best 4x400 at Penn *ever*? Hard to say...120some years to sort through, but this makes a decent case for consideration. There's certainly been closer finishes...
http://www.dyestat.com/gprofile.php?mgroup_id=44531&do=news&news_id=472938
Last US team to beat the Jamaicans in the HS boys 4x400.
"Coach Norford of Poly
When we went back into the stands, Americans were coming up to us and saying, ‘Thank you, thank you, for beating the Jamaicans.’ We were shaking hands for a long time that day. Yes, we were."