MileSplit Staff Apr 17, 2026 PRO See the rest of this article Access the complete article with MileSplit PRO. Subscribe to keep reading Already a subscriber? Log in. Improvement Rankings: Top Mississippi Boys Long Jump marks compared to their season’s best performances from 2025. Most Improved - Long Jump Comparing 2026 season to 2025 season Rank Improved Athlete/Team Class 2025 PR 2026 PR 1 +8' 1.00" Jaylen Robinson Brookhaven High School 2027 13-08.00 21-09.00 2 +5' 4.25" Johnathan Smalley Natchez High School 2026 17-02.75 22-07.00 3 +5' 3.00" Dj Jefferson Long Beach High School 2027 12-05.00 17-08.00 4 +5' 2.50" dede scott Coffeeville High School 2027 13-00.00 18-02.50 5 +4' 10.50" Julian McCullum Raleigh High School 2029 13-10.50 18-09.00