| MR | Northern Illinois Invitational | 3:23.25 | Adenekan, Rogers, King, Gamez | C. L. South | 2009 |
| Lane | Team | Squad | Athlete 1 | Athlete 2 | Athlete 3 | Athlete 4 | Seed |
|---|---|---|---|---|---|---|---|
| 3 | Freeport (H.S.) | A | Lassandro | Ferguson | Baker | Michael | 3:54.49 |
| 4 | Belvidere (North) | A | Winters | O'brien | Soma | Stegman | 3:50.30 |
| 5 | Machesney Park (Harlem) | A | Durnil | Wehde | Malmgren | Tyrcha | 3:52.18 |
| Lane | Team | Squad | Athlete 1 | Athlete 2 | Athlete 3 | Athlete 4 | Seed |
|---|---|---|---|---|---|---|---|
| 1 | Rockford (Boylan Catholic) | A | Wedwick | Murray | Strombeck | Fiorenza | 3:43.34 |
| 2 | Rockton (Hononegah) | A | Cavanagh | Estrada | Waugh | Otero | 3:39.07 |
| 3 | Sterling (H.S) | A | Doss | Britt | Johnson | Cid | 3:33.49 |
| 4 | Sycamore (H.S) | A | Huber | Emmert | Schmidt | Oestreicher | 3:31.56 |
| 5 | Crystal Lake (Prairie Ridge) | A | Shoufer | Koch | Llanquiman | Demakis | 3:32.04 |
| 6 | Rolling Meadows | A | Vann | Perry | Availa | Campbell | 3:37.18 |
| 7 | Crystal Lake (South) | A | Johnson | Marunde | Alvarado | Miller | NT |
| 8 | Rochelle | A | Wyssbrod | Sergeant | Orlikowski | Escalante | 3:47.01 |