MileSplit Staff May 29, 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 300m Hurdles marks compared to their season’s best performances from 2025. Most Improved - 300 Meter Hurdles Comparing 2026 season to 2025 season Rank Improved Athlete/Team Class 2025 PR 2026 PR 1 -18.72 Kemarion Walker Wilkinson County High School 2027 1:05.00 46.28 2 -15.61 Trevor De'Armon Jumpertown High School 2028 59.46 43.85 3 -11.90 Machai Malloy South Pike High School 2027 56.54 44.64 4 -10.74 James Warfield Vicksburg High School 2028 53.84 43.10 5 -10.00 Juszyant Garvin Calhoun City High School 2027 52.00 42.00 6 -9...