MileSplit Staff Jun 05, 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 Washington 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 -13.97 Carson Munden Columbia High School 2028 1:02.29 48.32 2 -9.27 James Marrazzo Cheney Senior High School 2028 53.78 44.51 3 -8.32 Beau Spreine Lopez School 2027 58.04 49.72 4 -8.07 Mark Trofimchik Cascade Christian School 2027 53.74 45.67 5 -8.01 Luke Stirling Seton Catholic 2028 52.65 44.64 6 -7.91 Rishi Khante ...