| Athlete | Team | Best | |||||
|---|---|---|---|---|---|---|---|
| 1 | Martinez, Arturo | North Central (Ill.) |
49.98
5/13-14 |
50.93
5/1-2 |
51.17
4/22 |
51.24
5/8-9 |
52.11
4/17-18 |
| 2 | O'Brien, Linus | Grinnell |
49.98
3/28 |
51.10
3/19-21 |
51.14
4/4 |
