Most Improved Illinois Boys 400m Marks Compared to 2025

Mar 27, 2026

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

Most Improved - 400 Meter Dash

Comparing 2026 season to 2025 season

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Rank	Improved	Athlete/Team	Class	2025 PR	2026 PR
1	-7.10	Zee Siangas Beardstown	2029	1:08.24	1:01.14
2	-6.61	Jeriel Perez-Martinez Yorkville (Y. Christian)	2027	1:08.39	1:01.78
3	-6.51	Hayden Morris Bunker Hill	2029	1:16.14	1:09.63
4	-6.10	Henry Warren Forreston	2027	1:04.91	58.81
5	-4.71	Ezekiel Bergeson Forreston	2029	1:07.87	1:03.16