| Lane | Athlete | Team | Seed | Note |
|---|---|---|---|---|
| 1 | WILSON, CHRIS | CONANT | 1:07.57 | Merrimack Valley Invitational |
| 2 | HUTCHINSON, TYLER | HOLLIS/BROOKLINE | 1:05.50 | |
| 3 | STANLEY, JEREMY | MILFORD | 1:01.14 | John Stark vs. Milford, West |
| 4 | HART, RYAN | CAMPBELL | 1:01.49 | DougSargent FrSo Invitational 2018 |
| 5 | ARRUDA, ZACHARY | CONANT | 1:07.00 | |
| 6 | TATE, SAM | SANBORN REGIONAL | 1:08.06 | Merrimack Valley Invitational |
| Lane | Athlete | Team | Seed | Note |
|---|---|---|---|---|
| 1 | ADL-ZARABI, CYRUS | MILFORD | 59.86 | Kiwanis Freshman-Sophomore 2018 |
| 2 | MALONEY, NATHAN | HOLLIS/BROOKLINE | 58.70 | Hollis Brookline vs. ConVal, Trinity, Conant & Mascenic |
| 3 | SOMERO, DAKOTA | MASCENIC REGIONAL | 58.00 | |
| 4 | HAMPSEY, LOGAN | CONANT | 58.50 | Hollis Brookline vs. ConVal, Trinity, Conant & Mascenic |
| 5 | MANN, SETH | CONANT | 59.00 | Bow Saturday Meet 5/13 |
| 6 | ABELSON, MICHAEL | CAMPBELL | 59.91 | DougSargent FrSo Invitational 2018 |
| Lane | Athlete | Team | Seed | Note |
|---|---|---|---|---|
| 1 | VALLIANT, BEN | MILFORD | 56.75 | CBNA Home Meet #1 |
| 2 | HOGAN, LUKE | CAMPBELL | 54.14 | 5-8 Gilford |
| 3 | STONE, JORDIN | HOLLIS/BROOKLINE | 52.70 | Hollis Brookline vs. ConVal, Trinity, Conant & Mascenic |
| 4 | BOGANNAM, KASHIEF | SANBORN REGIONAL | 52.74 | |
| 5 | GARCIA, VICTOR | MILFORD | 54.44 | John Stark vs. Milford, West |
| 6 | AUGER, CALEB | MILFORD | 58.00 |