Marvin Williams 50.39 WYL wins dramatic boys 400mh final IAAF World Youth Champs 2013
515 Marvin Williams JAMJAM 50.39 WYL
227 Yang Wang CHNCHN 50.78
911 Kenneth Selmon USAUSA 51.30
517 Takumu Furuya JPNJPN 51.58
684 Derick Diaz PURPUR 51.76 PB
554 Geofrey Kipkoech Cheruiyot KENKEN DNF
516 Okeen Williams JAMJAM DNF
899 Marlon Humphrey USAUSA DNS
8th IAAF World Youth Championships UKRAINE Donetsk,
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