| Event | Rank | Mark | By | Meet |
| | | National Elites above. State Elites below | | |
| B-300H | 1 | 38.90 | Wolz, Justin (2016) (Minooka Community, IL) | Southwest Prairie Boys Conference Meet(IL), 2015-05-14(#1) |
| B-300H | 2 | 39.48 | Hrobowski, Devaughn (2016) (Plainfield North, IL) | Hunt Invitational(IL), 2015-04-30(#1) |
| B-300H | 3 | 39.56 | Smith, Prince (2016) (Plainfield East, IL) | Southwest Prairie Boys Conference Meet(IL), 2015-05-14(#2) |
| B-300H | 4 | 40.64 | Thompson, Bernard (2015) (Plainfield East, IL) | IL 3A Plainfield North Boys Sectional(IL), 2015-05-21(#5) |
| B-300H | 5 | 41.01 | Samms, Jared (2015) (Plainfield North, IL) | Hunt Invitational(IL), 2015-04-30(#3) |
| B-300H | 6 | 41.11 | Simpson, Devonshe (2015) (Oswego East, IL) | Red Ribbon Classic(IL), 2015-05-02(#5) |
| B-300H | 7 | 41.12 | Povilaitis, Rashawn Marc (Romeoville, IL) | IL 3A Downers Grove South Boys Sectional(IL), 2015-05-22(#4) |
| B-300H | 8 | 41.18 | Ulmer, Nathan (2016) (Plainfield South, IL) | IL 3A Plainfield North Boys Sectional(IL), 2015-05-21(#8) |
| B-300H | 9 | 41.28 | Kenny, Canyon (2015) (Minooka Community, IL) | IL 3A Plainfield North Boys Sectional(IL), 2015-05-21(#9) |
| B-300H | 10 | 41.46 | Hutt, Jalen (2016) (Plainfield East, IL) | IL 3A Plainfield North Boys Sectional(IL), 2015-05-21(#11) |
| B-300H | 11 | 41.63 | Povilait, Rashawn Marc (2015) (Romeoville, IL) | Carlin Nalley Invitational(IL), 2015-05-09(#2) |
| B-300H | 12 | 41.80 | Perhon, Sebastian (2015) (Plainfield Central, IL) | Hunt Invitational(IL), 2015-04-30(#6) |
| B-300H | 13 | 41.94 | Povalaitis, Marcos (2015) (Romeoville, IL) | Gus Scott Co-Ed Invitational(IL), 2015-04-17(#3) |
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| | | See more performances for B-300H | | |
