H - Denotes home games (H) - Denotes Homecoming
1970 AA
Coach: Dennis Rath
* Charlie Crawford ran a fumble back 100 yards from the Mustang goaline.
* Prosser had to forfeit the game because of the use of an ineligible player.1975 AA W L T 5 4 0 Coach: Dennis Rath Prosser 7 Hanford 6 Prosser 0 Toppenish 18 Prosser 22 Grandview 8 Prosser 24 West Valley 13 Prosser 19 Wapato 7 Prosser 3 Sunnyside 28 Prosser 18 Othello 36 Prosser 22 Selah 28 Prosser 15 Ellensburg 7 Total 130 151 1976 AA W L T 2 7 0 Coach: Dennis Rath Prosser 7 Othello 14 Prosser 16 Grandview 20 Prosser 19 Hanford 27 Prosser 24 Toppenish 12 Prosser 12 Ellensburg 20 Prosser 12 Sunnyside 19 Prosser 6 West Valley 13 Prosser 16 Wapato 13 Prosser 7 Selah 48 Total 107 186 1977 AA W L T 1 8 0 Coach: Dennis Rath Prosser 12 Wapato 6 Prosser 6 Selah 35 Prosser 0 Ellensburg 13 Prosser 0 East Valley 6 Prosser 6 Grandview 14 Prosser 18 Othello 39 Prosser 0 Sunnyside 26 Prosser 6 Toppenish 30 Prosser 12 Hanford 19 Total 60 188 1978 AA W L T 1 8 0 Coach: Roy Abshire Prosser 0 Wapato 48 Prosser 0 Selah 41 Prosser (H) 12 Ellensburg 33 Prosser 7 East Valley 6 Prosser 0 Grandview 21 Prosser 0 Othello 32 Prosser 0 Sunnyside 27 Prosser 8 Toppenish 24 Prosser 0 Hanford 20 Total 27 252
* Prosser had to forfeit the game because of the use of an ineligible player.
Coach: Roy Abshire
* On September 21, 1979 the Prosser Mustangs held their first game at Art Fiker stadium.