MileSplit Staff May 15, 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 California 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 -13.23 Sebastian Hubbard Ontario (SS) 2027 54.75 41.52 2 -10.75 Nathaniel Becker Chico (NS) 2026 57.46 46.71 3 -10.05 Ethan Leon Temescal Canyon (SS) 2026 52.44 42.39 4 -9.49 Sogo Ibimisan-Omotuyole St. Augustine (SD) 2028 50.92 41.43 5 -9.36 Martin Alvarez Santee EC (LA) 2026 53.83 44.47 6 -9.18 Tristan Harris ...