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 400m marks compared to their season’s best performances from 2025. Most Improved - 400 Meter Dash Comparing 2026 season to 2025 season Rank Improved Athlete/Team Class 2025 PR 2026 PR 1 -16.44 Diego Ochoa McFarland (CS) 2026 1:06.38 49.94 2 -10.95 Kiyon Neal Lincoln (Abraham) (SD) 2026 1:02.71 51.76 3 -10.71 Jodie Davis Washington (George) Prep (LA) 2026 1:04.30 53.59 4 -10.61 Lewis Argueta Hesperia (SS) 2026 1:02.32 51.71 5 -10.16 Jason Hamilton Jr Clayton Valley Charter (NC) 2027 1:04.88 54.72 6 -9.79 Elijah C...