| Event | Rank | Mark | By | Meet |
| | | National Elites above. State Elites below | | |
| B-400 | 1 | 48.52 | Rush, Courtney (2015) (Windsor, CT) | CT Open State Championships(CT), 2015-06-08(#1) |
| B-400 | 2 | 48.77 | Okoro, Simeon (2015) (Weston, CT) | CT Open State Championships(CT), 2015-06-08(#2) |
| B-400 | 3 | 48.94 | Fort, Isaiah (16) (Plainfield, CT) | Eastern Connecticut Conference(CT), 2015-05-23(#1) |
| B-400 | 4 | 49.21 | Brown, Spencer (2015) (Wilton, CT) | FCIAC Championships(CT), 2015-05-26(#1) |
| B-400 | 5 | 49.33 | Keating, Johnathan (2015) (Ridgefield, CT) | FCIAC Championships(CT), 2015-05-26(#2) |
| B-400 | 6 | 49.46 | Mackay-Morgan, Christian (2016) (Northwest Catholic, CT) | CCC West Championships(CT), 2015-05-26(#1) |
| B-400 | 7 | 49.73 | Camacho, Tayquan (2015) (Norwalk, CT) | FCIAC Championships(CT), 2015-05-26(#3) |
| B-400 | 8 | 49.76 | Gebril, Omar (2017) (North Haven, CT) | New England Championships(ME), 2015-06-13(#8) |
| B-400 | 9 | 49.81 | Stewartson, Brendon (2016) (Hillhouse, CT) | CT Class MM State Meet(CT), 2015-06-02(#1) |
| B-400 | 10 | 49.87 | Zirn, Micah (15) (Weston, CT) | CT Class M State Meet(CT), 2015-06-03(#3) |
| B-400 | 11 | 49.92 | Marcoux, Devon (2015) (Windham, CT) | CT Class M State Meet(CT), 2015-06-03(#4) |
| B-400 | 12 | 49.97 | Gleen, Tyler (2017) (Trumbull, CT) | FCIAC Championships(CT), 2015-05-26(#4) |
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| | | See more performances for B-400 | | |
