| Year |
Result |
Place |
Venue |
Date |
| 1969 |
49.3 |
3 |
Knoxville |
Jun 21 |
| 1970 |
48.5 |
1 |
Des Moines |
Jun 20 |
| 1971 |
48.9 |
1 |
Helsinki |
Jun 30 |
| 1972 |
48.4 |
2 |
Eugene |
Jul 2 |
| 1973 |
49.3 |
4 |
Bakersfield |
Jun 16 |
| 1974 |
49.0 |
4 |
Milan |
Jul 2 |
| 1975 |
48.74 |
4 |
Eugene |
Jun 21 |
| 1976 |
48.77 |
7 |
Westwood |
Jun 12 |
|
| International |
| Year |
Result |
Place |
| 1971 (PanAmer) |
49.10 |
1 |
| 1972 (Olympic) |
48.51 |
2 |
| 1975 (PanAmer) |
50.04 |
2 |
| National |
| Year |
Result |
Place |
| 1969 (USA Champ.) |
50.1 |
1 |
| 1970 (USA Champ.) |
49.8 MRy |
1 |
| 1971 (USA Champ.) |
49.3 MRy |
1 |
| 1972 (Olympic Trial) |
48.4 AR |
1 |
| 1973 (USA Champ.) |
49.6 |
2 |
| 1974 (USA Champ.) |
49.5 |
2 |
| 1975 (USA Champ.) |
48.74 MRm |
1 |
| 1976 (Olympic Trial) |
49.82 |
6 |
| 1976 (USA Champ.) |
48.77 |
3 |
|
| American Records |
|
(• - Record was ratified)
|
| • |
48.8y |
Des Moines
|
Jun 20, 1970
|
| • |
48.4 |
Eugene
|
Jul 02, 1972
|
| Electronic Timing |
| • |
48.51 |
München
|
Sep 02, 1972
|
|