MileSplit Staff May 01, 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 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 -13.98 Pranav Atukuri Henry M Jackson High School 2028 1:18.43 1:04.45 2 -13.27 David Hernandez Bellarmine Preparatory School 2028 1:12.54 59.27 3 -11.03 Thomas Gould North Thurston High School 2027 1:19.07 1:08.04 4 -10.22 Michael Rosemond Redmond Senior High School 2028 1:03.88 53.66 4 -10.22 Isaac Nava Wahluke High School 2028 1:09.81 59.59 6 ...