| Event | Rank | Mark | By | Meet |
| | | National Elites above. State Elites below | | |
| B-400 | 1 | 49.82 | Miller, John (2015) (Loyola Academy, IL) | IL 3A Loyola Academy Boys Sectional(IL), 2015-05-21(#3) |
| B-400 | 2 | 50.02 | Rodriguez, Alex (2015) (Brother Rice, IL) | Oak Lawn Invitational(IL), 2015-04-18(#1) |
| B-400 | 3 | 50.32 | Johnson, Tyler (2015) (St. Rita, IL) | USATF IL Assc JO Championships(IL), 2015-06-28(#9) |
| B-400 | 4 | 50.52 | West, Mitch (2017) (Montini Catholic, IL) | SCC Boys Conference Meet(IL), 2015-05-12(#1) |
| B-400 | 5 | 50.84 | Brown, Isaiah (2016) (Marmion Academy, IL) | IL 3A West Aurora Boys Sectional(IL), 2015-05-21(#3) |
| B-400 | 6 | 51.35 | Griffin, Nate (2016) (Providence Catholic, IL) | Chicago Catholic League Championships(IL), 2015-05-16(#4) |
| B-400 | 7 | 52.13 | Favela, Eduardo (Providence Catholic, IL) | CCL F/S Championships(IL), 2015-05-07(#1) |
| B-400 | 8 | 52.24 | Boyer, Wilkins (2015) (Brother Rice, IL) | Chicago Catholic League Championships(IL), 2015-05-16(#5) |
| B-400 | 9 | 52.43 | Davis, Jaelen (2016) (De La Salle Institute, IL) | Palatine Relays(IL), 2015-05-02(#6) |
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| | | See more performances for B-400 | | |
