Event | Rank | Mark | By | Meet |
| | | National Elites above. State Elites below | | |
B-400 | 1 | 50.92 | Pierce, Jackson (2016) (Nashville Comm, IL) | Breese Tri-County Initational(IL), 2015-04-27(#1) |
B-400 | 2 | 51.46 | Victoria, Michael (2015) (Harrisburg, IL) | Mascoutah Boys Military Classic(IL), 2015-04-24(#1) |
B-400 | 3 | 51.73 | Hagene, Kyle (2016) (Sparta, IL) | Buzz Bradley Relays(IL), 2015-04-24(#1) |
B-400 | 4 | 51.80 | Crim, Corbin (2016) (Harrisburg, IL) | Southern Illinois River to River Boys Conference Meet(IL), 2015-05-14(#1) |
B-400 | 5 | 52.27 | Richardson, Keandre (Sparta, IL) | Murphysboro Boys Invitational(IL), 2015-04-18(#2) |
B-400 | 6 | 52.34 | Hartley, Gavin (2016) (Benton, IL) | USATF IL Assc JO Championships(IL), 2015-06-28(#19) |
B-400 | 7 | 52.36 | Brewster, Jordan (2018) (Frankfort, IL) | IL 2A Triad Boys Sectional(IL), 2015-05-21(#6) |
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| | | See more performances for B-400 | | |