| Time | Date | Name | Meet |
|---|---|---|---|
| 55.55 | Feb. 10, 2017 | Brendan Howley | Liberal Arts Championships |
| 56.04 | Nov. 19, 2016 | Brendan Howley | Phoenix Fall Classic |
| 56.83 | March 1, 2013 | Eric Grunden | NAIA Championships |
| 57.63 | March 4, 2011 | Eric Grunden | NAIA National Championships |
| 58.24 | Feb. 18, 2011 | Max Ramminger | Liberal Arts Championships |
| 58.39 | March 5, 2010 | Eric Grunden | NAIA National Championships |
| 59.04 | Jan. 16, 2010 | Max Ramminger | Chicago Invitational |
| 1:00.45 | Jan. 9, 2010 | Max Ramminger | Millikin vs. Illinois Tech |
| 1:02.70 | Dec. 5, 2008 | Jay Park | TYR/CollegeSwimming Classic |
| 1:02.72 | Feb. 23, 2008 | Jay Park | Midwest Invitational Last Chance Meet |
| 1:03.51 | Nov. 30, 2007 | Jay Park | TYR/CollegeSwimming.com Classic |
