Rising Junior Jonathan Simms Clocks U.S. No. 6 All-Time 45.12 For 400m

Simms put together a legendary performance on the final day of AAU Junior Olympics.

It was a historic performance for the rising junior at Allen High School in Texas as he won the 15-16-year-old boys 400m in 45.12 on Saturday in Des Moines, breaking the age group record for the Junior Olympic Games.

But there's even more history behind that effort.

Simms not only broke a record, but clocked a U.S. No. 6 all-time run in the event, as well as recorded the fastest time ever for the 400m by a Texas high schooler.

The phenom also won the 800m two days prior in 1:51.69.

But, to add the icing to the cake, just 90 minutes after completing his title-winning 400m performance, Simms, clocked a 44.36 anchor split on the Impact Track 4x400m relay to end an epic Junior Olympics performance.