| Event | Rank | Mark | By | Meet |
| | | National Elites above. State Elites below | | |
| B-400 | 1 | 50.31 | Cuevas, Adrian (2016) (Jefferson, IL) | NIC-10 Boys Conference Meet(IL), 2015-05-15(#1) |
| B-400 | 2 | 50.96 | Davila, Luis (2015) (Jefferson, IL) | NIC-10 Boys Conference Meet(IL), 2015-05-15(#2) |
| B-400 | 3 | 50.99 | Jones, Duwayne-Patriq (2017) (Hononegah, IL) | AAU JO Region 13 Qualifier(IL), 2015-07-05(#4) |
| B-400 | 4 | 51.24 | Jefferson, Martaviyon (2016) (Rockford East, IL) | NIC-10 Boys Conference Meet(IL), 2015-05-15(#3) |
| B-400 | 5 | 51.35 | Christiansen, Jared (2015) (Hononegah, IL) | Northern Illinois Invitational(IL), 2015-05-08(#1) |
| B-400 | 6 | 51.49 | Shattuck, Forest (2016) (Belvidere North, IL) | IL 3A Guilford Boys Sectional(IL), 2015-05-21(#4) |
| B-400 | 7 | 52.02 | Flores, Randy (2016) (Jefferson, IL) | Gib Seegers Invitational(IL), 2015-05-01(#4) |
| B-400 | 8 | 52.46 | Harter, Austin (2015) (Hononegah, IL) | NIC-10 Boys Conference Meet(IL), 2015-05-15(#5) |
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| | | See more performances for B-400 | | |
