| 12-17-21 Lon vs Por, Big | Date: 12-17-21 Venue: Londonderry - Londonderry, NH |
| Men's Open/Senior100 Butterfly |
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| Place | Overall | Name | Year | Team | Time | Score |
|---|---|---|---|---|---|---|
| 1 | 1 | Margeson, William | SR | Portsmouth | 59.18 | - |
| 2 | 2 | Branson, Slate | JR | Londonderry | 1:03.25 | - |
| 3 | 3 | Rantala, Markus | SR | Bishop Guertin | 1:05.93 | - |