| Event | Rank | Mark | By | Meet |
| | | National Elites above. State Elites below | | |
| B-400 | 1 | 48.59 | Akins, Kevion (2015) (Cahokia, IL) | Winston Brown Invitational(IL), 2015-04-25(#1) |
| B-400 | 2 | 49.08 | Porter, Aaron (2017) (Marion, IL) | IL 2A Boys State Finals(IL), 2015-05-30(#3) |
| B-400 | 3 | 49.67 | Lyons, Tyran (2016) (Cahokia, IL) | IL 2A Boys State Prelims(IL), 2015-05-29(#4) |
| B-400 | 4 | 50.02 | Stanley, Chris (2017) (Cahokia, IL) | IL 2A Triad Boys Sectional(IL), 2015-05-21(#2) |
| B-400 | 5 | 50.42 | Mcgee, Chris (2016) (Cahokia, IL) | Corey Siebert Invitational(MO), 2015-04-18(#2) |
| B-400 | 6 | 50.62 | Simmons, Kaleb (2016) (Althoff, IL) | IL 1A Chester Boys Sectional(IL), 2015-05-21(#1) |
| B-400 | 7 | 51.84 | McCauley, Denzel (2015) (Carbondale Comm, IL) | Herrin Boys Invitational(IL), 2015-04-15(#2) |
| B-400 | 8 | 52.32 | Sherman, Drew (2015) (Centralia, IL) | IL 2A Triad Boys Sectional(IL), 2015-05-21(#5) |
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| | | See more performances for B-400 | | |
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