Most Improved Iowa Boys Long Jump Marks Compared to 2025

May 29, 2026

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Improvement Rankings: Top Iowa Boys Long Jump marks compared to their season’s best performances from 2025.

Comparing 2026 season to 2025 season

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Rank	Improved	Athlete/Team	Class	2025 PR	2026 PR
1	+4' 2.75"	Jacoby Johnson Vinton-Shellsburg High School	2026	16-06.50	20-09.25
2	+4' 1.00"	Lavelle Osborn Rowe Southeast Polk High School	2028	16-08.50	20-09.50
3	+3' 11.50"	Tyshawn Dale Central Springs High School	2027	12-07.75	16-07.25
4	+3' 10.25"	Jayden Harris West Branch	2026	17-08.00	21-06.25
4	+3' 10.25"	Marcelin Kazumba Iowa City	2028	17-04.75	21-03.00