MileSplit Staff Apr 17, 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 Oklahoma Boys 1600m marks compared to their season’s best performances from 2025. Most Improved - 1600 Meter Run Comparing 2026 season to 2025 season Rank Improved Athlete/Team Class 2025 PR 2026 PR 1 -1:47.87 Yosvani Rueda Pryor High School 2029 7:25.58 5:37.71 2 -1:25.25 Josh Calvert Jones High School 2029 6:43.96 5:18.71 3 -1:17.68 Isaiah Mehagan FR Shawnee High School 2028 7:42.07 6:24.39 4 -1:07.50 Liam Hutchins Mcloud High School 2027 6:27.47 5:19.97 5 -1:07.32 Bentlee Frazier Balko-Forgan 2028 6:11.08 5:03.76 6 -1:01.35 ...