<page_title> Lynna Irby </page_title> <section_title> Early career </section_title> <table> <cell> Representing the United States </cell> <cell> 2016 IAAF World Junior (U20) Championships <col_header> Representing the United States </col_header> <col_header> IAAF Championships </col_header> </cell> <cell> 2nd <col_header> Representing the United States </col_header> <col_header> IAAF Championships </col_header> </cell> <cell> 400 m <col_header> Representing the United States </col_header> <col_header> IAAF Championships </col_header> </cell> <cell> 51.39 <col_header> Representing the United States </col_header> <col_header> IAAF Championships </col_header> </cell> <cell> 2015 IAAF World Youth (U18) Championships <col_header> Representing the United States </col_header> <col_header> IAAF Championships </col_header> </cell> <cell> 2nd <col_header> Representing the United States </col_header> <col_header> IAAF Championships </col_header> </cell> <cell> 400 m <col_header> Representing the United States </col_header> <col_header> IAAF Championships </col_header> </cell> <cell> 51.79 <col_header> Representing the United States </col_header> <col_header> IAAF Championships </col_header> </cell> </table>
While representing USA in both world meets, Irby got the silver in the 400M running 51.79 (U18 - 2015) and 51.39 (U20 - 2016).