Time | Date | Name | Team | Meet |
---|---|---|---|---|
46.71 | Feb. 23, 2013 | Connor Black | Mount Vernon High School | 13 Illinois Boys High School State Championships |
48.19 | Feb. 27, 2009 | Mike Dominski | New Trier High School | 09 Illinois Boys State Championships |
49.92 | Feb. 27, 2004 | Curtis Dauw | Saint Charles East High School | IHSA Boys State Championships |