World Athletics U20 Championships: US Team Runs Fastest Ever U20 Mixed 4x400m with 3:15.31 in Oregon
The quartet of Joshua Shelton, Taylor-Nicole Overton, Jaelen Hunter and Olivia Harris combined to take more than two seconds off the previous best of 3:17.69 achieved by another US team at the 2022 edition of the World U20 Championships in
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