| Time | Date | Name | Meet |
|---|---|---|---|
| 55.22 | Feb. 12, 2015 | Benjamin Laxson | Rocky Mountain Athletic Conference Championships |
| 55.69 | Feb. 21, 2014 | Benjamin Laxson | Rocky Mountain Athletic Conference Championships |
| 57.49 | Feb. 15, 2013 | Benjamin Laxson | Rocky Mountain Athletic Conference Championships |
| 58.04 | Feb. 17, 2012 | Benjamin Laxson | Rocky Mountain Athletic Conference Championships |
| 1:02.76 | Jan. 14, 2012 | Benjamin Laxson | Colorado Mesa Duals |
| 1:03.31 | Nov. 19, 2011 | Benjamin Laxson | Colorado Mesa University Invitational |
| 1:03.68 | Oct. 15, 2011 | Trey Griffith | Rocky Mountain Invitational |
| 1:05.11 | Jan. 23, 2011 | Cody Robson | Colorado College Invitational |
| 1:07.90 | Oct. 2, 2010 | Cody Robson | Adams State Duals |
