MileSplit Staff May 08, 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 Missouri 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 +1.98m Britton Haase Kickapoo High School 2029 4.30m 6.28m 2 +1.82m Donnie Thomas University Academy Charter 2028 3.91m 5.73m 3 +1.55m Jervin Riddle III William Chrisman High School 2026 5.15m 6.70m 4 +1.54m Braedon Russell Confluence Prep Academy Charter High School 2026 4.55m 6.10m 5 +1.44m Bryce McCoy Francis Howell High School 2028 4.38m 5.82m 6 ...