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Chicago Park District
| Time | Date | Name | Team | Meet |
|---|---|---|---|---|
| 4:15.97 | Aug. 2, 2011 | Conor Dwyer | Lake Forest Swim Club | ConocoPhillips National Championships |
| 4:25.16 | Aug. 3, 2010 | Alex Tyler | NASA Wildcat Aquatics | ConocoPhillips National Championships |
| 4:25.78 | July 24, 2003 | CASEY DAUW | Saint Charles Swim Team | Speedo Champions Series - Minneapolis |
| 4:27.25 | April 1, 2003 | Mike Alexandrov | Champaign County YMCA | ConocoPhillips National Championships |
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