| Name | Time | Date | Meet |
|---|---|---|---|
| FuKang Wong | 53.86 | March 6, 2019 | Mid-American Championships (M) |
| Bobby Wood | 54.26 | Nov. 19, 2016 | Louisville Invitational |
| Bobby Wood | 54.94 | March 4, 2016 | 2016 Mid-American Championships (M) |
| Calvin Kolar | 55.21 | March 6, 2015 | 2015 Mid-American Championships (M) |
| Calvin Kolar | 55.51 | March 7, 2014 | 2014 Mid-American Championships (M) |
| Jameson Kuper | 55.57 | Dec. 5, 2009 | Missouri Invitational |
| Jameson Kuper | 56.17 | Dec. 6, 2008 | 2008 Mizzou Invitational |
| Jameson Kuper | 58.49 | Nov. 7, 2008 | Missouri @Southern Illinois |
