Most Improved Massachusetts Boys 400m Marks Compared to 2025

Apr 10, 2026

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Improvement Rankings: Top Massachusetts 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	-8.97	Jabari Sauveur South Shore Vocational Technical High School	2028	1:06.00	57.03
2	-6.20	Diego Cifuentes Milford High School	2028	1:05.64	59.44
3	-5.97	William Vial Xaverian Brothers	2028	1:08.54	1:02.57
4	-5.66	James Kirkwood Hopkinton High School	2027	1:05.81	1:00.15
5	-5.60	Jack Johnson Whitinsville Christian	2028	1:25.34	1:19.74
6	-5...