Season
| Rank | Lowest Completion Percentage Allowed (Season) | Completions/Attempts | Year |
|---|---|---|---|
| 1 | 0.377 | 61 of 162 | 1950 |
| 2 | 0.389 | 58 of 149 | 1955 |
| 3 | 0.391 | 75 of 192 | 1974 |
| 4 | 0.393 | 48 of 122 | 1954 |
| 5 | 0.415 | 98 of 236 | 1949 |
| 6 | 0.430 | 80 of 156 | 1951 |
| 7 | 0.432 | 98 of 227 | 1977 |
| 8 | 0.441 | 87 of 197 | 1975 |
| 9 | 0.446 | 54 of 121 | 1960 |
| 10 | 0.447 | 72 of 161 | 1948 |
| 11 | 0.455 | 220 of 484 | 2007 |
| 12 | 0.457 | 90 of 197 | 1972 |
