I have been posting sprints by Matthew Boling and Terrance Laird, largely because they are Americans and I am rooting for them. I posted a few years ago about the Japanese sprinters, who have no one dominant runner but a very high baseline and could challenge all the West-African descended sprinters in the relays.
Well, this is it. Those are good numbers now that Usain Bolt is gone, and the world is changing.
They have good marathoners as well, just a notch below those from the Great African Rift Valley.