| Name | Time | Date | Meet |
|---|---|---|---|
| Matt Veldman | 49.43 | Feb. 24, 2012 | 2011-12 Illinois Boys High School State Championships |
| Matt Veldman | 50.11 | March 1, 2011 | 2010-11 Illinois Boys High School Best Times |
| Eric Chong | 52.58 | Feb. 26, 2010 | 2010 Illinois Boys High School Championships |
| Eric Chong | 52.60 | Feb. 27, 2009 | 2008-09 Illinois Boys State Championships |
| David Stachniak | 54.35 | Feb. 24, 2006 | Illinois State High School Championships |
