| Event | Rank | Mark | By | Meet |
| B-400 | 1 | 50.12 | Carroll, Esden (2015) (Algona, IA) | Iowa State Boys HS Classic(IA), 2015-03-17(#1) |
| | | National Elites above. State Elites below | | |
| B-400 | 2 | 51.04 | Kasap, Max (2015) (Dowling Catholic, IA) | Iowa State Boys HS Classic(IA), 2015-03-17(#2) |
| B-400 | 3 | 51.79 | Seeser, Wilson (2016) (Camanche, IA) | Tri-State Invitational(WI), 2015-03-21(#1) |
| B-400 | 4 | 51.93 | Vogel, Ross (2015) (Waukee, IA) | Wartburg Co-Ed Invitational(IA), 2015-03-03(#1) |
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| | | See more performances for B-400 | | |
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