| Event | Rank | Mark | By | Meet |
| B-300H | 1 | 37.13 | Michl, Isaiah (2015) (Edwardsville, IL) (US#22) | Southwestern Illinois Relays(IL), 2015-03-28(#1) |
| B-300H | 2 | 38.17 | Session, William (2016) (Belleville East, IL) | IL 3A Boys State Finals(IL), 2015-05-30(#4) |
| | | National Elites above. State Elites below | | |
| B-300H | 3 | 39.06 | Anderson, Delano (2017) (East St. Louis-Senior, IL) | IL 3A Normal West Boys Sectional(IL), 2015-05-22(#1) |
| B-300H | 4 | 39.20 | Anderson, Travis (2017) (Edwardsville, IL) | Southwestern Illinois Relays(IL), 2015-03-28(#2) |
| B-300H | 5 | 39.60 | Hammel-Brown, Zach (2016) (Collinsville, IL) | IL 3A Normal West Boys Sectional(IL), 2015-05-22(#5) |
| B-300H | 6 | 40.01 | Brown, Brian (2015) (East St. Louis-Senior, IL) | IL 3A Normal West Boys Sectional(IL), 2015-05-22(#8) |
| B-300H | 7 | 40.13 | Bobo, Raishon (2016) (Granite City, IL) | Southwest Boys Conference Meet(IL), 2015-05-13(#2) |
| B-300H | 8 | 41.08 | Griebe, Matt (2017) (Edwardsville, IL) | Granite City Invitational(IL), 2015-04-17(#4) |
| B-300H | 9 | 41.25 | Riggins, Juwan (2016) (Granite City, IL) | Collinsville Boys Invitational(IL), 2015-05-09(#4) |
| B-300H | 10 | 41.44 | Berry, Ricky (2017) (Belleville West, IL) | Southwest Boys Conference Meet(IL), 2015-05-13(#5) |
| B-300H | 11 | 41.66 | Johnson, Kevin (2016) (East St. Louis-Senior, IL) | Marion Freeman Invitational(MO), 2015-05-02(#7) |
| B-300H | 12 | 41.73 | Moore, Kris (2018) (Edwardsville, IL) | Collinsville Boys Invitational(IL), 2015-05-09(#5) |
| B-300H | 13 | 41.81 | Williamson, Raymon (2016) (O'Fallon, IL) | Southwest Boys Conference Meet(IL), 2015-05-13(#7) |
| B-300H | 14 | 41.89 | Nesbitt, Demarlo (2016) (Belleville West, IL) | Belleville West Boys Invitational(IL), 2015-04-11(#16) |
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| | | See more performances for B-300H | | |
