| Event | Rank | Mark | By | Meet |
| | | National Elites above. State Elites below | | |
| B-400 | 1 | 50.29 | Parker, Tavolis (2015) (J Sterling Morton, IL) | IL 3A Lyons Township Boys Sectional(IL), 2015-05-22(#1) |
| B-400 | 2 | 50.45 | Jordan, Brian (2016) (Hinsdale South, IL) | Mike Yavorski Hornet Invitational(IL), 2015-05-01(#2) |
| B-400 | 3 | 50.77 | Murphy, Josan (2016) (Willowbrook, IL) | WSC-Gold Boys Conference Meet(IL), 2015-05-15(#3) |
| B-400 | 4 | 51.69 | Eufrasio, Nick (Willowbrook, IL) | WSC-Gold Boys Conference Meet(IL), 2015-05-15(#4) |
| B-400 | 5 | 51.81 | Harris, Jevais (2016) (Hinsdale South, IL) | Bud Mohns Invitational(IL), 2015-04-18(#5) |
| B-400 | 6 | 52.06 | Gray, Adam (2016) (Downers Grove South, IL) | WSC-Gold Boys Conference Meet(IL), 2015-05-15(#5) |
| B-400 | 7 | 52.30 | James, Kameron (2016) (Proviso East, IL) | Palatine Relays(IL), 2015-05-02(#5) |
| B-400 | 8 | 52.31 | Osei, Jon (2015) (Downers Grove South, IL) | WSC-Gold Boys Conference Meet(IL), 2015-05-15(#6) |
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| | | See more performances for B-400 | | |
