1990-1999
1989-1990
| W | L | T | ||
| Non League | 2 | 3 | 0 | |
| League | 3 | 11 | 0 | |
| Playoffs | 0 | 1 | 0 | |
| Overall | 5 | 15 | 0 | |
Coach: Kevin Lusk
| Prosser | 46 | Grandview | 85 | |
| Prosser | 78 | Connell | 84 | |
| Prosser | 56 | Ki-Be | 45 | |
| Prosser | 71 | Zillah | 76 OT | |
| Prosser | 82 | Ki-Be | 54 | |
| Prosser | 68 | Hanford | 80 | |
| Prosser | 62 | Grandview | 88 | |
| Prosser | 51 | Ellensburg | 44 | |
| Prosser | 42 | Selah | 63 | |
| Prosser | 66 | Othello | 63 | |
| Prosser | 43 | West Valley | 69 | |
| Prosser | 61 | Eastmont | 67 | |
| Prosser | 68 | Sunnyside | 76 | |
| Prosser | 42 | Ellensburg | 59 | |
| Prosser | 54 | Selah | 91 | |
| Prosser | 90 | Othello | 79 | |
| Prosser | 45 | West Valley | 70 | |
| Prosser | 54 | Hanford | 59 | |
| Prosser | 53 | Eastmont | 69 | |
| Prosser | 56 | Sunnyside | 86 |
Districts
| Prosser | 49 | West Valley | 52 |
1990-1991
| W | L | T | ||
| Non League | 1 | 5 | 0 | |
| League | 6 | 8 | 0 | |
| Playoffs | 1 | 1 | 0 | |
| Overall | 8 | 14 | 0 | |
Coach: Kevin Lusk
| Prosser | 62 | Grandview | 106 | |
| Prosser | 61 | Connell | 73 | |
| Prosser | 72 | Ki-Be | 65 | |
| Prosser | 56 | Toppenish | 68 | |
| Prosser | 72 | Ki-Be | 65 | |
| Prosser | 63 | Hanford | 67 OT | |
| Prosser | 70 | Grandview | 79 | |
| Prosser | 54 | Ellensburg | 46 | |
| Prosser | 53 | Selah | 76 | |
| Prosser | 59 | Othello | 54 | |
| Prosser | 68 | West Valley | 97 | |
| Prosser | 61 | Eastmont | 70 | |
| Prosser | 65 | Sunnyside | 69 | |
| Prosser | 68 | Ellensburg | 50 | |
| Prosser | 54 | Selah | 64 | |
| Prosser | 58 | Hanford | 55 | |
| Prosser | 64 | Othello | 55 | |
| Prosser | 49 | West Valley | 61 | |
| Prosser | 54 | Eastmont | 78 | |
| Prosser | 80 | Sunnyside | 66 |
Districts
| Prosser | 65 | Sunnyside | 54 | |
| Prosser | 58 | West Valley | 71 |
1991-1992
| W | L | T | ||
| Non League | 3 | 1 | 0 | |
| League | 10 | 6 | 0 | |
| Playoffs | 2 | 2 | 0 | |
| Overall | 15 | 9 | 0 | |
Coach: Kevin Lusk
| Prosser | 68 | Ki-Be | 61 | |
| Prosser | 59 | Toppenish * | 58 | |
| Prosser | 62 | Selah | 44 | |
| Prosser | 65 | Hanford | 70 | |
| Prosser | 60 | Toppenish | 64 | |
| Prosser | 66 | Sunnyside | 57 | |
| Prosser | 65 | Eastmont | 72 | |
| Prosser | 71 | West Valley | 65 | |
| Prosser | 79 | Othello | 64 | |
| Prosser | 67 | Ellensburg | 41 | |
| Prosser | 60 | Grandview | 75 | |
| Prosser | 63 | Selah | 55 | |
| Prosser | 83 | Hanford | 72 | |
| Prosser | 75 | Connell | 63 | |
| Prosser | 74 | Eastmont | 82 | |
| Prosser | 72 | Sunnyside | 64 | |
| Prosser | 65 | West Valley | 84 | |
| Prosser | 71 | Othello | 56 | |
| Prosser | 58 | Ellensburg | 61 | |
| Prosser | 84 | Grandview | 91 |
Districts
Prosser 76 Sunnyside 67 Prosser 83 Grandview 85 Prosser 57 West Valley 56 Prosser 62 Grandview 67 * - George Mendoza hit 2 free throws with 24 seconds left as the Mustangs held on for the win.
1992-1993
| W | L | T | ||
| Non League | 2 | 1 | 0 | |
| League | 10 | 6 | 0 | |
| Playoffs | 4 | 2 | 0 | |
| Overall | 16 | 9 | 0 | |
Coach: Kevin Lusk
| Prosser | 66 | Ki-Be | 29 | |
| Prosser | 65 | Selah * | 64 | |
| Prosser | 63 | Hanford | 56 | |
| Prosser | 71 | Toppenish | 69 | |
| Prosser | 83 | Sunnyside | 49 | |
| Prosser | 57 | West Valley | 62 | |
| Prosser | 56 | Othello | 48 | |
| Prosser | 72 | Eastmont | 68 | |
| Prosser | 44 | Ellensburg | 57 | |
| Prosser | 88 | Grandview | 68 | |
| Prosser | 70 | Selah | 76 | |
| Prosser | 60 | Hanford | 55 2OT | |
| Prosser | 60 | Connell | 61 | |
| Prosser | 69 | Eastmont | 68 | |
| Prosser | 82 | Sunnyside | 53 | |
| Prosser | 65 | West Valley | 61 | |
| Prosser | 62 | Othello | 65 | |
| Prosser | 79 | Grandview | 81 OT | |
| Prosser | 68 | Ellensburg | 77 |
Districts
| Prosser | 83 | Othello | 52 | |
| Prosser | 58 | Ellensburg | 51 | |
| Prosser | 64 | Selah | 58 |
State
| Prosser | 57 | Shorecrest | 55 OT | |
| Prosser | 55 | Centralia | 57 | |
| Prosser | 64 | White River | 57 | |
| Prosser | 50 | Aberdeen | 53 |
7th Place
* - Aaron Sonnichsen made a lay-up with 2 seconds left for the win.
1993-1994
| W | L | T | ||
| Non League | 1 | 3 | 0 | |
| League | 3 | 13 | 0 | |
| Playoffs | 0 | 0 | 0 | |
| Overall | 4 | 16 | 0 | |
Coach: Andy Davis
| Prosser | 75 | Clarkston | 81 | |
| Prosser | 52 | Pullman | 59 | |
| Prosser | 59 | Connell | 52 | |
| Prosser | 51 | West Valley | 66 | |
| Prosser | 71 | Selah * | 70 | |
| Prosser | 44 | Hanford | 59 | |
| Prosser | 67 | Othello | 75 | |
| Prosser | 69 | Toppenish | 79 | |
| Prosser | 67 | Sunnyside | 75 | |
| Prosser | 78 | Grandview | 69 | |
| Prosser | 60 | Eastmont | 79 | |
| Prosser | 36 | Ellensburg | 56 | |
| Prosser | 68 | Sunnyside | 78 | |
| Prosser | 68 | Ephrata | 70 | |
| Prosser | 41 | West Valley | 77 | |
| Prosser | 68 | Selah | 71 OT | |
| Prosser | 32 | Hanford | 63 | |
| Prosser | 70 | Othello | 71 | |
| Prosser | 55 | Toppenish** | 56 | |
| Prosser | 88 | Grandview | 75 |
* - Kevin McClure hit a 15 foot baseline jumper as time expired for the win.
** - Mustang assistant coach Ryan Allen (Toppenish) sank a free throw with no time left for the win.
1994-1995
| W | L | T | ||
| Non League | 3 | 1 | 0 | |
| League | 4 | 12 | 0 | |
| Playoffs | 0 | 0 | 0 | |
| Overall | 7 | 13 | 0 | |
Coach: Kevin Lusk
| Prosser | 77 | Connell | 61 | |
| Prosser | 72 | Sunnyside | 66 | |
| Prosser | 65 | Clarkston | 60 | |
| Prosser | 68 | Pullman | 69 | |
| Prosser | 66 | West Valley | 110 | |
| Prosser | 72 | Selah | 71 | |
| Prosser | 58 | Hanford | 63 | |
| Prosser | 89 | Othello | 73 | |
| Prosser | 39 | Toppenish | 69 | |
| Prosser | 62 | Grandview | 69 | |
| Prosser | 58 | Eastmont | 62 | |
| Prosser | 69 | Ellensburg | 72 | |
| Prosser | 76 | Sunnyside | 79 OT | |
| Prosser | 65 | Ephrata | 67 OT | |
| Prosser | 57 | West Valley | 72 | |
| Prosser | 64 | Selah | 66 | |
| Prosser | 45 | Hanford | 56 | |
| Prosser | 79 | Othello | 100 | |
| Prosser | 61 | Toppenish * | 59 | |
| Prosser | 74 | Grandview | 72 |
* - Benji Sonnichsen's 5 foot jumper proved to be the game winner with 20 seconds left.
1985-1986
| W | L | T | ||
| Non League | 1 | 1 | 0 | |
| League | 11 | 7 | 0 | |
| Playoffs | 3 | 2 | 0 | |
| Overall | 15 | 10 | 0 | |
Coach: Kevin Lusk
| Prosser | 77 | Connell | 79 | |
| Prosser | 59 | West Valley | 84 | |
| Prosser | 65 | Ellensburg | 77 | |
| Prosser | 72 | Othello | 69 | |
| Prosser | 80 | Richland | 75 OT | |
| Prosser | 84 | Eastmont | 79 | |
| Prosser | 68 | Toppenish | 49 | |
| Prosser | 69 | Ephrata | 62 | |
| Prosser | 50 | Grandview | 52 | |
| Prosser | 50 | Selah | 62 | |
| Prosser | 84 | East Valley | 58 | |
| Prosser | 94 | Wapato | 82 | |
| Prosser | 82 | Sunnyside | 78 OT | |
| Prosser | 77 | Grandview | 70 | |
| Prosser | 77 | Toppenish | 47 | |
| Prosser | 91 | East Valley | 78 | |
| Prosser | 68 | Hanford | 78 | |
| Prosser | 91 | Wapato | 98 | |
| Prosser | 63 | Sunnyside | 60 | |
| Prosser | 68 | Hanford | 71 |
Districts
| Prosser | 69 | Eastmont | 65 | |
| Prosser | 62 | West Valley | 72 | |
| Prosser | 70 | Grandview | 60 | |
| Prosser | 84 | Wapato | 74 | |
| Prosser | 47 | Selah | 75 |
1996-1997
| W | L | T | ||
| Non League | 1 | 1 | 0 | |
| League | 16 | 2 | 0 | |
| Playoffs | 3 | 3 | 0 | |
| Overall | 20 | 6 | 0 | |
Coach: Kevin Lusk
| Prosser | 32 | Richland | 74 | |
| Prosser | 57 | Selah | 48 | |
| Prosser | 78 | Ephrata | 70 | |
| Prosser | 80 | Connell | 59 | |
| Prosser | West Valley | |||
| Prosser | 68 | Ellensburg | 49 | |
| Prosser | 56 | Othello | 60 | |
| Prosser | 46 | Eastmont | 50 | |
| Prosser | 83 | Toppenish | 56 | |
| Prosser | 67 | Grandview | 40 | |
| Prosser | 86 | East Valley | 78 | |
| Prosser | 76 | Wapato | 69 | |
| Prosser | 49 | Sunnyside * | 46 | |
| Prosser | 63 | Hanford | 49 | |
| Prosser | 46 | Grandview | 39 | |
| Prosser | 65 | Toppenish | 52 | |
| Prosser | 82 | East Valley ** | 74 | |
| Prosser | 85 | Wapato | 70 | |
| Prosser | 75 | Sunnyside | 64 | |
| Prosser | 83 | Hanford | 58 |
Districts
| Prosser | 74 | Ellensburg | 66 | |
| Prosser | 81 | Ephrata | 73 | |
| Prosser | 68 | Selah | 72 | |
| Prosser | 71 | Ephrata | 68 |
State
| Prosser | 49 | O'Dea | 80 | |
| Prosser | 39 | Centralia | 49 |
* - Jeremy Santo hit a game winning 3 point shot with 4 seconds left.
** - Shawn Van Winkle becomes only the second Mustang to reach 1,000 points in his career.
1997-1998
| W | L | T | ||
| Non League | 3 | 3 | 0 | |
| League | 7 | 7 | 0 | |
| Playoffs | 0 | 1 | 0 | |
| Overall | 10 | 11 | 0 | |
Coach: Kevin Lusk
| Prosser | 48 | Richland | 79 | |
| Prosser | 70 | Connell | 63 | |
| Prosser | 67 | Grandview * | 47 | |
| Prosser | 61 | Sehome | 78 | |
| Prosser | 63 | North Mason | 68 | |
| Prosser | 55 | Vancouver College, Vancouver B.C | 49 | |
| Prosser | 64 | Hanford | 69 | |
| Prosser | 72 | Selah | 46 | |
| Prosser | 64 | Ellensburg | 77 | |
| Prosser | 72 | Eastmont | 61 | |
| Prosser | 76 | Sunnyside ** | 69 | |
| Prosser | 54 | Moses Lake | 85 | |
| Prosser | 48 | West Valley | 63 | |
| Prosser | 59 | Hanford | 61 | |
| Prosser | 78 | Selah | 72 | |
| Prosser | 72 | Ellensburg | 70 | |
| Prosser | 59 | Eastmont | 56 | |
| Prosser | 77 | Sunnyside | 61 | |
| Prosser | 55 | Moses Lake | 81 | |
| Prosser | 30 | West Valley | 60 |
Districts
|
Prosser |
53 | Sunnyside | 56 |
* - Jeremy Santo hit 7 of 10 three pointers in victory.
** - Tyler Thomas became 3rd Mustang to reach 1,000 points in career.
1998-1999
| W | L | T | ||
| Non League | 4 | 2 | 0 | |
| League | 3 | 11 | 0 | |
| Playoffs | 0 | 1 | 0 | |
| Overall | 7 | 14 | 0 | |
Coach: Kevin Lusk
| Prosser | 69 | Grandview | 81 | |
| Prosser | 29 | Richland | 70 | |
| Prosser | 68 | Connell | 58 | |
| Prosser | 69 | Grandview | 52 | |
| Prosser | 72 | Pendleton | 71 | |
| Prosser | 57 | Hermiston | 55 | |
| Prosser | 46 | Hanford | 48 | |
| Prosser | 54 | Selah | 57 | |
| Prosser | 52 | Ellensburg | 58 | |
| Prosser | 48 | Eastmont | 63 | |
| Prosser | 62 | Sunnyside | 55 | |
| Prosser | 53 | Moses Lake | 63 | |
| Prosser | 50 | West Valley | 61 | |
| Prosser | 49 | Hanford | 70 | |
| Prosser | 78 | Selah | 81 | |
| Prosser | 63 | Ellensburg | 41 | |
| Prosser | 77 | Eastmont | 73 OT | |
| Prosser | 66 | Sunnyside | 63 OT | |
| Prosser | 49 | Moses Lake | 50 | |
| Prosser | 54 | West Valley | 56 |
Districts
|
Prosser |
56 | Sunnyside | 63 |
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