Most Improved Illinois Boys 400m Marks Compared to 2025

Apr 10, 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

Rank	Improved	Athlete/Team	Class	2025 PR	2026 PR
1	-16.44	Eli Sells Dunlap	2026	1:14.03	57.59
2	-9.40	Samuel Casey Chicago (Noble Street Charter)	2026	1:11.71	1:02.31
3	-8.19	Abisola Alabi Chicago (C. Math and Science Charter)	2028	1:23.73	1:15.54
4	-7.10	Zee Siangas Beardstown	2029	1:08.24	1:01.14
5	-6.61	Jeriel Perez-Martinez Yorkville (Y. Christian)	2027	1:08.39	1:01.78
6	-6.53