Most Improved Missouri Boys 400m Marks Compared to 2025

Mar 27, 2026

This content requires a MileSplit Pro plan.
Join Now and select any plan for instant access!

MileSplit Pro Join Now

Improvement Rankings: Top Missouri Boys 400m marks compared to their season’s best performances from 2025.

Most Improved - 400 Meter Dash

Comparing 2026 season to 2025 season

Rank	Improved	Athlete/Team	Class	2025 PR	2026 PR
1	-11.78	Parker Jensen Valley Park High School	2027	1:54.02	1:42.24
2	-11.72	Jamison Wilmesherr North Point High School	2027	1:10.69	58.97
3	-10.84	Brycen McKee Seneca High School	2028	1:11.54	1:00.70
4	-8.29	Keilan Lowe McCluer North High School	2028	1:01.16	52.87
5	-8.02	Karson Pierre Woodland High School	2028	1:16.24	1:08.22
6	-7.87	...