| Event | Rank | Mark | By | Meet |
| | | National Elites above. State Elites below | | |
| B-400 | 1 | 50.10 | Treadwell, Juwaun (2017) (Crete-Monee, IL) | Blue Smoke Invitational(IL), 2015-04-11(#1) |
| B-400 | 2 | 50.61 | Smith, Will (2017) (Crete-Monee, IL) | AAU Central District Qualifier(IL), 2015-06-14(#4) |
| B-400 | 3 | 50.89 | Davis, Antonio (2017) (Bloom Township, IL) | Winston Brown Invitational(IL), 2015-04-25(#3) |
| B-400 | 4 | 50.99 | Vance, Vanharvey (2018) (Rich Central, IL) | IL 2A Boys State Prelims(IL), 2015-05-29(#11) |
| B-400 | 5 | 51.06 | Agee, Jacobi (2016) (Bloom Township, IL) | USATF Youth National Championships 17-18(IL), 2015-07-05(#18) |
| B-400 | 6 | 51.39 | Vance, Harvey (2018) (Rich Central, IL) | IL 2A Hillcrest Boys Sectional(IL), 2015-05-22(#2) |
| B-400 | 7 | 52.36 | Vanharvey, Vance (2018) (Rich Central, IL) | Southland Athletic Boys Conference Meet(IL), 2015-05-13(#3) |
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| | | See more performances for B-400 | | |
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