| Event | Rank | Mark | By | Meet |
| | | National Elites above. State Elites below | | |
| B-400 | 1 | 49.76 | Svoboda, Kyle (2015) (John Hersey, IL) | IL 3A Loyola Academy Boys Sectional(IL), 2015-05-21(#2) |
| B-400 | 2 | 49.84 | Gaines, Jawan (2015) (Fremd, IL) | Palatine Relays(IL), 2015-05-02(#1) |
| B-400 | 3 | 49.98 | Melynchuk, Brandon (2015) (Barrington, IL) | Palatine Relays(IL), 2015-05-02(#2) |
| B-400 | 4 | 50.11 | Eiring, Konrad (2015) (Barrington, IL) | Mid-Suburban League Boys Championships(IL), 2015-05-15(#1) |
| B-400 | 5 | 50.65 | Lewis, Kyle (2015) (Fremd, IL) | MSL-West Boys Divisional Championship(IL), 2015-04-28(#1) |
| B-400 | 6 | 50.83 | Zaley, Ben (2016) (Schaumburg, IL) | MSL-West Boys Divisional Championship(IL), 2015-04-28(#3) |
| B-400 | 7 | 51.28 | Elms, Nick (2016) (Conant, IL) | Mid-Suburban League Boys Championships(IL), 2015-05-15(#3) |
| B-400 | 8 | 51.62 | McMahon, Ryan (2016) (Fremd, IL) | Mid-Suburban League Boys Championships(IL), 2015-05-15(#4) |
| B-400 | 9 | 51.69 | Rustay, Declan (2018) (Hoffman Estates, IL) | MSL-West Boys Divisional Championship(IL), 2015-04-28(#4) |
| B-400 | 10 | 51.77 | Suarez, Greg (2015) (Prospect, IL) | MSL-East Boys Divisional Championship(IL), 2015-04-28(#1) |
| B-400 | 11 | 51.86 | Sherwood, Kevin (2017) (Prospect, IL) | Mid-Suburban League Boys Championships(IL), 2015-05-15(#5) |
| B-400 | 12 | 52.08 | Nicoletti, Jack (2016) (Barrington, IL) | MSL-West Boys Divisional Championship(IL), 2015-04-28(#5) |
| B-400 | 13 | 52.27 | Cossio, Luis (Barrington, IL) | Mid-Suburban League Boys Championships(IL), 2015-05-15(#1) |
| B-400 | 14 | 52.34 | Zieba, Mat (Rolling Meadows, IL) | Mid-Suburban League Boys Championships(IL), 2015-05-15(#2) |
| B-400 | 15 | 52.46 | Anderson, Tyler (2015) (Barrington, IL) | Mid-Suburban League Boys Championships(IL), 2015-05-15(#6) |
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| | | See more performances for B-400 | | |
