start in lower even lane, finish in the lane assigned
| W | World | 50.50 | Rollins, Harper-Nelson, Harrison, Castlin | USA Blue | 4/24/2015 | Des Moines, IA |
| A | American | 50.51 | Rollins, Harper- Nelson, Harrison, Castlin | USA Blue | 4/25/2015 | Des Moines, IA |
| C | College Outdoor | 52.50 | Thomas, Mayo, Flemings, Ruddock | Texas A&M | Philadelphia, PA | |
| MS | Mississippi State School | 54.33 | Wallace, Aaron, Farquharson, T. Lee | 2010 |
| Lane | Team | Squad | Seed |
|---|---|---|---|
| 3 | ARKANSAS ST. | A | 1:02.88 |
| 5 | ALCORN ST. | A | DNS |
| Lane | Team | Squad | Seed |
|---|---|---|---|
| 3 | MISSOURI ST. | A | 58.10 |
| 5 | MISS STATE | A | DQ |
| 7 | UAB | A | 56.41 |