| 1) | Hickok, Drake | Central College | 54.10 (05/09-05/11) | 54.48 (05/09-05/11) | 54.62 (05/16-05/17) | 54.91 (04/25-04/26) | 54.99 (05/04) | 55.08 (04/20) | 55.52 (04/12-04/13) | 55.59 (03/28) |
| 2) | Espy, Matt | Claremont-Mudd-Scripps | 54.10 (04/26) | 55.30 (04/06) | 55.58 (04/26) | 56.76 (03/23) | 56.87 (04/13) | 57.85 (05/04) | 57.97 (03/02) | 58.03 (03/29-03/30) |