| Event | Rank | Mark | By | Meet |
| | | National Elites above. State Elites below | | |
| B-400 | 1 | 50.59 | Miller, Dillon (2015) (Jacksonville, IL) | IL 2A Lanphier Boys Sectional(IL), 2015-05-22(#2) |
| B-400 | 2 | 51.30 | Warren, Heath (2016) (Springfield, IL) | Springfield Boys Triangular(IL), 2015-04-02(#1) |
| B-400 | 3 | 51.38 | Blair, Tristan (2017) (Sacred Heart-Griffin, IL) | USATF IL Assc JO Championships(IL), 2015-06-28(#12) |
| B-400 | 4 | 51.67 | Strode, Tyler (2015) (Lanphier, IL) | Lanphier Boys Open(IL), 2015-04-11(#2) |
| B-400 | 5 | 51.88 | Smith, Eddie (Springfield, IL) | Central State Eight Boys Conference Meet(IL), 2015-05-15(#2) |
| B-400 | 6 | 52.08 | Jackson, Daryl (2015) (Lanphier, IL) | Solon Lion Boys Open(IL), 2015-04-14(#1) |
| B-400 | 7 | 52.37 | James, Noah (2016) (Jacksonville, IL) | Mark Twain/Becky Thatcher Relays(MO), 2015-05-01(#5) |
| B-400 | 8 | 52.40 | Williams, Cameron (Glenwood, IL) | Central State Eight Boys Conference Meet(IL), 2015-05-15(#3) |
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| | | See more performances for B-400 | | |
