I see a pr of 48.6. What's the source for 46 400m speed? He's just broken 1:50, so 1:46.5 is pretty far out there, but it was indoors. He's signed with Mississippi, so he'll have a great coach and teammates to develop with.
He wasnt 3rd. He was 5th. 2 kids from the slower heats beat him. Probably 2 kids that were placed in slower heats because he's a Sahlman and as such must be in the fast heat