| Lane | Athlete | Yr. | Team | Seed | Note |
|---|---|---|---|---|---|
| 1 | Malinowsky, Dylan | SO | Augustana (Ill.) | NT | |
| 2 | Lathrop, Brad | SO | Augustana (Ill.) | NT | |
| 3 | Binegar, Alexander | FR | Augustana (Ill.) | NT | |
| 5 | Miller, Jack | JR | Augustana (Ill.) | 53.54 | NCC Dr. Keeler Track Field Invitational - 2017 |
| 6 | Wright, Mason | FR | Augustana (Ill.) | 53.90 | |
| 7 | Goforth, Cody | SO | Augustana (Ill.) | 56.84 | Augustana Viking Olympics |
| 8 | Henrikson, Tate | FR | Augustana (Ill.) | NT | |
| 9 | Siaw, Whitaker | SO | Augustana (Ill.) | NT |
| Lane | Athlete | Yr. | Team | Seed | Note |
|---|---|---|---|---|---|
| 1 | Cooley, Jeremiah | SO | Aurora | 52.57 | F. Lee Slick Track & Field Invitational |
| 2 | Mimlitz, AJ | FR | Augustana (Ill.) | 52.37 | North Central College Dr. Keeler Meet |
| 3 | Ruiz, Trevor | JR | Central College | 52.00 | Iowa Conference Outdoor Championships |
| 4 | Werkheiser, Joe | JR | Rockford | 50.66 | 2017 NACC Outdoor Track & Field Championships |
| 5 | Bohlen, Vance | JR | St. Ambrose | 50.50 | |
| 6 | Gradoville, Evan | JR | Loras | 50.58 | Iowa Conference Outdoor Championships |
| 7 | Duehr, Joe | SO | Wartburg | 51.07 | Monmouth Fighting Scots Outdoor |
| 8 | Neff, Clayton | Iowa Track and Field Club | 52.28 | Rittgers Invitational | |
| 9 | Campos, Jesus | FR | Rockford | 52.56 |
| Lane | Athlete | Yr. | Team | Seed | Note |
|---|---|---|---|---|---|
| 1 | Nichols, Rane | JR | St. Ambrose | 50.30 | |
| 2 | Dostal, Brennan | SR | Buena Vista | 49.62 | Red Raider Open 2018 |
| 3 | Swanson, Jeffrey | SR | Augustana (Ill.) | 49.05 | |
| 4 | Coughenour, Jordan | JR | Simpson (Iowa) | 48.30 | 52.42 in 400H this past Friday |
| 5 | Ohioze, Michael | Iowa Elite | 47.74 | ||
| 6 | Hucker, Kyle | SR | Augustana (Ill.) | 48.25 | CCIW Outdoor Track & Field Championships |
| 7 | LaMendola, Alex | SR | Augustana (Ill.) | 48.30 | CCIW Outdoor Track & Field Championships |
| 8 | Pestka, Josh | JR | St. Ambrose | 49.30 | |
| 9 | Warren, James | Iowa Elite | 49.90 |