Prosser Mustangs
| 1953 |
Richland Bombers |
19 |
Prosser Mustangs |
7 |
| 1952 |
Richland Bombers |
34 |
Prosser Mustangs |
0 |
| 1951 |
Richland Bombers |
55 |
Prosser Mustangs |
0 |
| 1950 |
Richland Bombers |
27 |
Prosser Mustangs |
0 |
| 1949 |
Richland Bombers |
27 |
Prosser Mustangs |
0 |
| 1948 |
Richland Bombers |
33 |
Prosser Mustangs |
6 |
| 1947 |
Richland Bombers |
2 |
Prosser Mustangs |
9 |
| 1946 |
Richland Bombers |
24 |
Prosser Mustangs |
12 |
| Richland mascot officially changed from Beavers to Bombers |
| 1945 |
Richland Bombers |
0 |
Prosser Mustangs |
25 |
| 1944 |
Richland Beavers |
19 |
Prosser Mustangs |
0 |
| 1926 |
Richland Colts |
0 |
Prosser Mustangs |
14 |
| 1926 |
Richland Colts |
0 |
Prosser Mustangs |
14 |
| 1915 |
Richland |
7 |
Prosser Mustangs |
28 |
| 1915 |
Richland |
0 |
Prosser Mustangs |
0 |
Notes: Prosser High School's mascot was the Cardinals during most of the 1920's. It is not known exactly when Prosser adopted the Mustang mascot.
