| Event | Rank | Mark | By | Meet |
| | | National Elites above. State Elites below | | |
| B-400 | 1 | 49.77 | Hooker, Dion (2015) (Sycamore, IL) | NIB-12 Boys Conference Meet(IL), 2015-05-15(#1) |
| B-400 | 2 | 49.99 | Pointer, Colfay (2016) (Rochelle, IL) | NIB-12 Boys Conference Meet(IL), 2015-05-15(#2) |
| B-400 | 3 | 50.32 | Perkins, Chauncie (2015) (DeKalb, IL) | Gib Seegers Invitational(IL), 2015-05-01(#2) |
| B-400 | 4 | 51.24 | Watkins, Tanner (2015) (Sycamore, IL) | NIB-12 Boys Conference Meet(IL), 2015-05-15(#3) |
| B-400 | 5 | 51.31 | Bruce, Terrance (2016) (Sterling, IL) | IL 2A Sterling Boys Sectional(IL), 2015-05-22(#4) |
| B-400 | 6 | 51.62 | Arroyo, Gabe (2016) (Yorkville, IL) | IL 3A Plainfield North Boys Sectional(IL), 2015-05-21(#4) |
| B-400 | 7 | 51.89 | Hofer, Lucas (2017) (Geneseo, IL) | IL 2A LaSalle-Peru Boys Sectional(IL), 2015-05-22(#4) |
| B-400 | 8 | 52.07 | Arroyo, Luis (2015) (Yorkville, IL) | AAU Central District Qualifier(IL), 2015-06-14(#4) |
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| | | See more performances for B-400 | | |
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