| W | World Outdoor 2024 | 43.03 | Wayne van Niekerk | RSA | 8/14/2016 | Rio de Jameiro, BRA |
| A | American Outdoor 2024 | 43.18 | Michael Johnson | Nike | 8/26/1999 | Seville, ESP |
| C | College Outdoor 2024 | 43.61 | Michael Norman | So. California | 6/8/2018 | Eugene, OR |
| N | NEC championship | 45.91 | Richard James | Long Island | 2003 | |
| I | IC4A | 49.24 |
| Lane | # | Athlete | Yr. | Team | Seed |
|---|---|---|---|---|---|
| 1 | 39 | PHILLIP, KYMOY | SO | CENTRAL CONNECTICUT |
48.82 |
| 2 | 204 | STEN, MARK | FR | MERRIMACK |
48.70 |
| 3 | 13 | COLANGELO, NOAH | FR | CENTRAL CONNECTICUT |
48.08 |
| 4 | 164 | COUTURE, CORY | SR | MERRIMACK |
47.97 |
| 5 | 247 | MAHARIO, RAFAEL | JR | SACRED HEART |
47.32 |
| 6 | 389 | MARCHESE, JASON | JR | WAGNER |
47.79 |
| 7 | 145 | THEOSMY, MAKHI | SR | LIU |
47.70 |
| 8 | 142 | SCOTT, ELEHCHIO | JR | LIU |
48.20 |
| Lane | # | Athlete | Yr. | Team | Seed |
|---|---|---|---|---|---|
| 2 | 253 | MEIKLE, CONNOR | JR | SACRED HEART |
50.55 |
| 3 | 101 | MOSER, CHRISTOPHER | FR | LE MOYNE |
50.39 |
| 4 | 204 | STEN, MARK | FR | MERRIMACK |
49.24 |
| 5 | 116 | DESAI, LEKH | SO | LIU |
52.79 |
| 6 | 389 | MARCHESE, JASON | JR | WAGNER |
47.05 |
| 7 | 254 | MIELE, DOMINIC | JR | SACRED HEART |
52.56 |
| 8 | 13 | COLANGELO, NOAH | FR | CENTRAL CONNECTICUT |
48.85 |
| Lane | # | Athlete | Yr. | Team | Seed |
|---|---|---|---|---|---|
| 2 | 203 | SMITH, JAEDEN | SR | MERRIMACK |
50.56 |
| 3 | 76 | MASSARI, ANTHONY | FR | FDU |
49.70 |
| 4 | 269 | SARGENT, JAKOB | JR | SACRED HEART |
52.52 |
| 5 | 145 | THEOSMY, MAKHI | SR | LIU |
48.81 |
| 6 | 247 | MAHARIO, RAFAEL | JR | SACRED HEART |
47.18 |
| 7 | 43 | ROBERTSON, COLE | FR | CENTRAL CONNECTICUT |
50.06 |
| 8 | 272 | SONTA, CHRISTIAN | FR | SACRED HEART |
54.47 |
| Lane | # | Athlete | Yr. | Team | Seed |
|---|---|---|---|---|---|
| 3 | 107 | SCOTT, BRANDON | JR | LE MOYNE |
50.94 |
| 4 | 39 | PHILLIP, KYMOY | SO | CENTRAL CONNECTICUT |
49.98 |
| 5 | 142 | SCOTT, ELEHCHIO | JR | LIU |
48.37 |
| 6 | 379 | CARMAN, JONATHAN | FR | WAGNER |
52.14 |
| 7 | 164 | COUTURE, CORY | SR | MERRIMACK |
47.27 |
| 8 | 342 | DOUGHERTY, JACK | FR | STONEHILL |
49.98 |