48 Wins, 52 Losses
| Date | Game Type | Upset Magnitude | |||
|---|---|---|---|---|---|
| 12/27/86 | Lost | Foster 47 | Renton 49 | Non-league | 7.005 |
| 12/15/87 | Won | Foster 52 | Chimacum 39 | League | 0.077 |
| 12/18/87 | Won | Foster 62 | Port Townsend 58 | League | 4.320 |
| 02/05/88 | Won | Foster 51 | Eatonville 47 | League | 4.845 |
| 02/12/88 | Lost | Foster 60 | Orting 73 | League | 12.397 |
| 12/13/88 | Lost | Foster 44 | Chimacum 48 | League | 1.816 |
| 01/03/89 | Won | Foster 36 | North Mason 35 | League | 11.460 |
| 12/09/89 | Won | Foster 59 | Hazen 57 | Non-league | 5.458 |
| 12/16/89 | Lost | Foster 43 | Highline 50 | Non-league | 2.401 |
| 02/06/90 | Won | Foster 55 | Eatonville 48 | League | 3.243 |
| 02/17/90 | Won | Foster 56 | Eatonville 48 | Playoff | 3.243 |
| 02/23/90 | Lost | Foster 43 | Steilacoom 52 | Playoff | 1.839 |
| 02/24/90 | Won | Foster 48 | Eatonville 38 | Playoff | 3.243 |
| 02/27/91 | Lost | Foster 45 | Woodland 57 | Playoff | 4.531 |
| 02/28/91 | Won | Foster 62 | Toppenish 55 | Playoff | 2.534 |
| 12/27/91 | Won | Foster 70 | Lynden 65 | Non-league | 14.392 |
| 12/28/91 | Won | Foster 49 | Nooksack Valley 47 | Non-league | 4.461 |
| 03/05/92 | Won | Foster 57 | Nooksack Valley 50 | Playoff | 4.461 |
| 01/23/93 | Lost | Foster 42 | Garfield 70 | Non-league | 5.633 |
| 02/06/93 | Lost | Foster 41 | Lynden Christian 59 | Non-league | 0.606 |
| 03/03/93 | Lost | Foster 33 | Lynden Christian 36 | Playoff | 0.606 |
| 12/28/93 | Lost | Foster 48 | Okanogan 49 | Non-league | 3.812 |
| 01/29/94 | Won | Foster 54 | Lynden Christian 49 | Non-league | 0.261 |
| 03/02/94 | Lost | Foster 51 | Okanogan 62 | Playoff | 3.812 |
| 01/28/95 | Lost | Foster 45 | Lynden Christian 64 | Non-league | 0.660 |
| 03/02/95 | Lost | Foster 50 | East Valley (Yakima) 53 | Playoff | 0.326 |
| 12/29/95 | Lost | Foster 45 | Wenatchee 57 | Non-league | 9.043 |
| 02/13/96 | Lost | Foster 51 | Seattle Christian 53 | League | 17.732 |
| 02/28/96 | Lost | Foster 70 | Liberty Bell 76 | Playoff | 7.841 |
| 03/01/96 | Lost | Foster 49 | Blaine 59 | Playoff | 13.107 |
| 12/14/96 | Won | Foster 55 | Kennedy 52 | Non-league | 1.893 |
| 01/04/97 | Won | Foster 73 | Wenatchee 72 | Non-league | 5.863 |
| 02/19/97 | Lost | Foster 48 | Charles Wright 52 | League | 21.243 |
| 03/07/97 | Won | Foster 48 | Dayton 45 | Playoff | 1.033 |
| 12/02/97 | Lost | Foster 49 | Charles Wright 54 | Non-league | 10.713 |
| 02/17/98 | Lost | Foster 42 | Eatonville 46 | League | 8.374 |
| 01/26/99 | Won | Foster 47 | Eatonville 44 | League | 25.412 |
| 02/20/99 | Lost | Foster 49 | Klahowya 51 | Playoff | 4.569 |
| 01/14/00 | Won | Foster 33 | Orting 32 | League | 2.842 |
| 02/09/00 | Won | Foster 52 | Klahowya 47 | Non-league | 6.844 |
| 12/27/00 | Lost | Foster 43 | Hazen 49 | Non-league | 0.560 |
| 01/09/01 | Won | Foster W | Orting L | League | 17.273 |
| 01/12/01 | Won | Foster 40 | Chimacum 28 | League | 0.194 |
| 01/30/01 | Won | Foster 49 | Chimacum 42 | League | 0.194 |
| 02/09/01 | Won | Foster 41 | Vashon Island 40 | League | 8.461 |
| 01/22/02 | Lost | Foster 60 | Steilacoom 66 | League | 1.545 |
| 02/12/02 | Lost | Foster 37 | Orting 57 | League | 12.093 |
| 02/14/02 | Won | Foster 42 | Port Townsend 39 | League | 7.689 |
| 01/15/03 | Won | Foster 50 | Klahowya 49 | League | 4.187 |
| 02/07/03 | Won | Foster 45 | Chimacum 38 | League | 4.814 |
| 02/25/03 | Won | Foster 45 | Chimacum 35 | Playoff | 4.814 |
| 01/23/04 | Lost | Foster 47 | Chimacum 59 | League | 6.148 |
| 02/10/04 | Won | Foster 60 | North Mason 44 | League | 3.025 |
| 11/30/04 | Won | Foster 46 | West Seattle 42 | Non-league | 6.698 |
| 12/14/04 | Won | Foster 38 | Granite Falls 36 | Non-league | 5.758 |
| 02/01/05 | Won | Foster 39 | Seattle Christian 38 | League | 2.783 |
| 02/15/05 | Won | Foster 46 | Orting 41 | Playoff | 12.697 |
| 12/13/05 | Lost | Foster 39 | Granite Falls 45 | Non-league | 8.338 |
| 01/27/06 | Lost | Foster 52 | Vashon Island 56 | League | 5.343 |
| 02/25/06 | Lost | Foster 52 | Vashon Island 54 | Playoff | 5.343 |
| 03/03/06 | Lost | Foster 31 | Port Townsend 38 | Playoff | 0.949 |
| 12/01/06 | Lost | Foster 50 | Granite Falls 53 | Non-league | 0.283 |
| 12/20/06 | Lost | Foster 53 | Vashon Island 55 | Non-league | 11.045 |
| 01/26/07 | Lost | Foster 58 | Washington 67 | League | 6.990 |
| 02/02/07 | Lost | Foster 55 | Steilacoom 56 | League | 6.401 |
| 01/15/08 | Lost | Foster 46 | Steilacoom 52 | League | 11.006 |
| 01/18/08 | Won | Foster 49 | Eatonville 48 | League | 8.250 |
| 02/27/08 | Won | Foster 48 | Kingston 44 | Playoff | 4.611 |
| 12/03/08 | Lost | Foster 46 | Kent-Meridian 63 | Non-league | 7.738 |
| 01/09/09 | Lost | Foster 38 | Lindbergh 44 | League | 4.476 |
| 01/12/09 | Lost | Foster 58 | Hazen 60 | League | 4.550 |
| 02/06/09 | Lost | Foster 49 | Lindbergh 50 | League | 4.476 |
| 02/13/09 | Lost | Foster 59 | Renton 64 | League | 12.141 |
| 12/18/09 | Lost | Foster 42 | Tyee 45 | League | 6.419 |
| 01/11/10 | Lost | Foster 51 | Hazen 62 | League | 0.413 |
| 01/29/10 | Lost | Foster 23 | Tyee 53 | League | 6.419 |
| 12/08/10 | Lost | Foster 43 | Tyee 59 | League | 13.369 |
| 12/28/10 | Won | Foster 53 | Beamer 49 | Non-league | 1.217 |
| 12/07/11 | Lost | Foster 58 | Tyee 67 | League | 2.000 |
| 12/09/11 | Lost | Foster 47 | Highline 50 | League | 2.198 |
| 12/13/11 | Won | Foster 69 | Kennedy Catholic 68 | League | 15.760 |
| 12/19/11 | Lost | Foster 38 | Auburn Adventist 59 | Non-league | 7.980 |
| 01/24/12 | Won | Foster 60 | Kennedy Catholic 54 | League | 15.760 |
| 01/31/12 | Won | Foster 48 | Hazen 44 | League | 7.493 |
| 02/18/12 | Won | Foster 48 | North Kitsap 47 | Playoff | 10.001 |
| 12/01/12 | Won | Foster 32 | Seattle Christian 24 | Non-league | 2.552 |
| 02/08/13 | Lost | Foster 37 | Lindbergh 41 | Playoff | 7.798 |
| 02/09/13 | Lost | Foster 36 | Fife 42 | Playoff | 7.935 |
| 01/13/14 | Won | Foster 54 | Hazen 43 | League | 4.153 |
| 01/28/15 | Won | Foster 45 | Lindbergh 34 | League | 4.771 |
| 01/30/15 | Lost | Foster 35 | Highline 40 | League | 1.915 |
| 01/15/16 | Lost | Foster 41 | Tyee 45 | League | 3.068 |
| 02/13/16 | Won | Foster 65 | Steilacoom 63 | Playoff | 11.828 |
| 01/11/17 | Won | Foster 41 | Washington 37 | League | 0.027 |
| 12/16/17 | Lost | Foster 39 | Franklin 40 | Non-league | 2.747 |
| 02/02/18 | Won | Foster 66 | Steilacoom 62 | Playoff | 0.350 |
| 02/13/18 | Won | Foster 49 | Steilacoom 34 | Playoff | 0.350 |
| 12/15/18 | Won | Foster 65 | Holy Names 64 | Non-league | 2.460 |
| 02/14/19 | Lost | Foster 45 | Renton 53 | Playoff | 5.092 |
| 01/31/20 | Won | Foster 43 | Tyee 34 | League | 9.292 |
41 Wins, 36 Losses
| Date | Game Type | Upset Magnitude | |||
|---|---|---|---|---|---|
| 01/28/03 | Won | Foster 72 | Eatonville 62 | League | 1.472 |
| 01/31/03 | Lost | Foster 53 | Vashon Island 55 | League | 4.430 |
| 02/07/03 | Won | Foster 75 | Chimacum 71 | League | 5.146 |
| 02/11/03 | Lost | Foster 66 | Orting 74 | League | 4.929 |
| 01/13/04 | Lost | Foster 49 | Eatonville 55 | League | 0.811 |
| 02/10/04 | Won | Foster 76 | North Mason 74 | League | 1.532 |
| 03/11/04 | Lost | Foster 35 | Blaine 56 | Playoff | 0.662 |
| 12/06/04 | Won | Foster 61 | Highline 52 | Non-league | 3.455 |
| 02/08/05 | Won | Foster 50 | Port Townsend 49 | League | 2.906 |
| 12/20/05 | Won | Foster 53 | Highline 49 | Non-league | 0.768 |
| 01/06/06 | Won | Foster 67 | Chimacum 64 | League | 11.438 |
| 01/31/06 | Won | Foster 46 | Seattle Christian 39 | League | 12.336 |
| 02/07/06 | Won | Foster 52 | Port Townsend 50 | League | 3.638 |
| 02/14/06 | Won | Foster 60 | Port Townsend 43 | Playoff | 3.638 |
| 12/30/06 | Lost | Foster 49 | Fife 52 | Non-league | 8.289 |
| 03/02/07 | Lost | Foster 47 | Sequim 66 | Playoff | 0.217 |
| 12/01/07 | Lost | Foster 43 | Hazen 50 | Non-league | 7.185 |
| 12/06/07 | Lost | Foster 39 | Sammamish 48 | Non-league | 8.369 |
| 12/14/07 | Lost | Foster 57 | Tumwater 58 | Non-league | 0.736 |
| 02/15/08 | Won | Foster 48 | Fife 46 | League | 2.564 |
| 01/21/09 | Lost | Foster 66 | Kennedy 78 | League | 6.364 |
| 02/04/09 | Won | Foster 73 | Mount Rainier 69 | League | 2.162 |
| 02/06/09 | Lost | Foster 48 | Lindbergh 57 | League | 15.155 |
| 02/26/09 | Won | Foster 55 | Renton 54 | Playoff | 2.349 |
| 03/06/09 | Lost | Foster 64 | Lakes 80 | Playoff | 2.298 |
| 01/13/10 | Lost | Foster 52 | Renton 53 | League | 3.868 |
| 01/19/10 | Won | Foster 60 | Kennedy Catholic 58 | League | 0.128 |
| 01/27/10 | Lost | Foster 52 | Mount Rainier 57 | League | 1.431 |
| 01/28/10 | Lost | Foster 54 | Evergreen (Highline) 61 | League | 4.774 |
| 12/21/10 | Lost | Foster 74 | Bonney Lake 80 | Non-league | 16.205 |
| 12/29/10 | Won | Foster 79 | River Ridge 64 | Non-league | 7.573 |
| 01/12/11 | Lost | Foster 73 | Lindbergh 75 | League | 10.505 |
| 01/25/11 | Won | Foster 71 | Kennedy Catholic 68 | League | 0.992 |
| 01/28/11 | Lost | Foster 57 | Renton 67 | League | 3.963 |
| 02/18/11 | Lost | Foster 44 | Franklin Pierce 49 | Playoff | 1.442 |
| 02/19/11 | Lost | Foster 59 | Renton 67 | Playoff | 3.963 |
| 01/11/12 | Won | Foster 62 | Lindbergh 52 | League | 6.319 |
| 02/01/12 | Won | Foster 50 | Hazen 43 | League | 0.410 |
| 02/04/12 | Won | Foster 50 | Evergreen (Highline) 36 | League | 1.132 |
| 02/11/12 | Won | Foster 42 | Eatonville 36 | Playoff | 1.890 |
| 02/20/12 | Won | Foster 53 | Sequim 45 | Playoff | 0.005 |
| 11/27/12 | Lost | Foster 52 | Interlake 57 | Non-league | 1.321 |
| 11/30/12 | Won | Foster 70 | Liberty (Issaquah) 54 | Non-league | 1.424 |
| 12/11/12 | Won | Foster 52 | Auburn Mountainview 50 | Non-league | 1.268 |
| 12/29/12 | Lost | Foster 44 | Snohomish 47 | Non-league | 1.390 |
| 01/04/13 | Lost | Foster 46 | Highline 49 | League | 23.434 |
| 01/09/13 | Lost | Foster 46 | Lindbergh 51 | League | 0.272 |
| 02/01/13 | Lost | Foster 52 | Evergreen (Highline) 58 | League | 4.779 |
| 01/08/14 | Won | Foster 70 | Renton 68 | League | 2.343 |
| 01/29/14 | Won | Foster 69 | Renton 68 | League | 2.343 |
| 02/17/14 | Won | Foster 63 | Renton 38 | Playoff | 2.343 |
| 02/22/14 | Won | Foster 66 | Bremerton 49 | Playoff | 2.547 |
| 12/17/14 | Won | Foster 79 | Evergreen (Highline) 49 | League | 0.778 |
| 12/23/14 | Won | Foster 82 | Seattle Christian 77 | Non-league | 4.635 |
| 01/03/15 | Won | Foster 59 | Charles Wright 58 | Non-league | 6.051 |
| 01/07/15 | Won | Foster 49 | Highline 40 | League | 2.035 |
| 01/16/15 | Lost | Foster 48 | Tyee 63 | League | 5.091 |
| 01/30/15 | Won | Foster 43 | Highline 40 | League | 2.035 |
| 12/07/15 | Won | Foster 59 | Sultan 56 | Non-league | 3.302 |
| 12/09/15 | Won | Foster 58 | Tyee 52 | League | 3.712 |
| 12/19/15 | Won | Foster 64 | Seattle Christian 53 | Non-league | 2.045 |
| 01/22/16 | Lost | Foster 62 | Evergreen (Highline) 69 | League | 1.259 |
| 01/13/18 | Won | Foster 40 | Sammamish 38 | Non-league | 4.360 |
| 01/16/18 | Won | Foster 53 | White River 43 | League | 6.910 |
| 11/27/18 | Lost | Foster 51 | Cleveland 54 | Non-league | 11.071 |
| 12/14/18 | Lost | Foster 68 | Renton 74 | League | 1.243 |
| 01/08/19 | Lost | Foster 64 | Fife 66 | League | 1.429 |
| 01/11/19 | Lost | Foster 57 | Foss 70 | League | 2.213 |
| 02/02/19 | Lost | Foster 58 | Steilacoom 72 | Playoff | 3.762 |
| 02/06/19 | Lost | Foster 54 | Olympic 81 | Playoff | 8.067 |
| 02/15/19 | Lost | Foster 68 | Steilacoom 71 | Playoff | 3.762 |
| 12/02/19 | Lost | Foster 62 | Decatur 67 | Non-league | 8.445 |
| 12/19/19 | Won | Foster 74 | Renton 65 | League | 1.909 |
| 12/21/19 | Won | Foster 92 | Nathan Hale 68 | Non-league | 5.887 |
| 01/27/20 | Won | Foster 65 | Renton 63 | League | 1.909 |
| 02/03/20 | Lost | Foster 62 | Fife 64 | League | 6.482 |
| 02/06/20 | Won | Foster 54 | Renton 52 | Playoff | 1.909 |