This guy is legit! Ran 1:45 for a big PR at Stanford and now 2nd to Rudisha at a Diamond League ahead of Centro, Manzano, Andrews, Rutt, Wheating, Solomon, Bosse. A host of world and Olympic medalists/3:30/1:42 guys and he ran with balls from the front on Rudisha's shoulder the whole way. 1:43.84 is LEGIT! Vigil has another pupil.
Was this his limit? Hopefully not since guys like Rudisha and Bosse are still in training phase, and are working towards the world champs.