| Time | Date | Name | Meet |
|---|---|---|---|
| 46.48 | Dec. 13, 2015 | Krzysztof Jankiewicz | Delta State Christmas Invitational |
| 46.65 | March 13, 2015 | Krzysztof Jankiewicz | NCAA Division II Championships |
| 47.28 | Dec. 14, 2014 | Jakub Jonczyk | Delta State Invitational |
| 48.45 | March 14, 2014 | Ramunas Paknys | NCAA Division II Championships |
| 48.71 | Dec. 15, 2013 | Ramunas Paknys | Delta State Christmas Invitational |
| 48.73 | Feb. 9, 2013 | Ramunas Paknys | Northern Sun Intercollegiate Conference |
| 49.16 | Nov. 30, 2012 | Ramunas Paknys | Missouri Invitational |
| 49.94 | Nov. 20, 2011 | Ramunas Paknys | Phoenix Fall Classic |
| 50.30 | Nov. 18, 2011 | Ramunas Paknys | Phoenix Fall Classic |
| 50.45 | March 4, 2011 | Ramunas Paknys | NAIA National Championships |
| 50.92 | March 5, 2010 | Simon Morley | NAIA National Championships |
| 51.06 | Feb. 19, 2010 | Simon Morley | Liberal Arts Championships |
| 52.50 | Jan. 23, 2010 | Carlos Tejero | Illinois Tech/St. Louis U/Missouri State/Lindenwood U Quad |
| 52.82 | Nov. 21, 2009 | Carlos Tejero | Washington University Invitational |
| 53.84 | Oct. 10, 2009 | Simon Morley | Show-Me Showdown |
