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| Time | Date | Name | Team | Meet |
|---|---|---|---|---|
| 45.09 | March 15, 2019 | Marius Kusch | Queens University Charlotte | NCAA Division II Championship |
| 45.88 | March 16, 2018 | Paul Pijulet | Queens University Charlotte | NCAA Division II Championship |
| 46.15 | Feb. 16, 2018 | Paul Pijulet | Queens University Charlotte | Bluegrass Mountain Championships |
| 46.27 | March 10, 2016 | Marco Palacios | Florida Southern College | NCAA Division II Championships |
| 46.48 | Dec. 13, 2015 | Krzysztof Jankiewicz | Lindenwood University | Delta State Christmas Invitational |
| 46.65 | March 13, 2015 | Krzysztof Jankiewicz | Lindenwood University | NCAA Division II Championships |
| 46.99 | March 15, 2012 | Oscar Pereiro | University of Bridgeport | NCAA Division II Championships |
| 47.59 | March 11, 2011 | Oscar Pereiro | University of Bridgeport | NCAA Division II Championships |
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