Division I (Mountain)
| League | Season | |||||
| Won | Lost | Pct | Won | Lost | Pct | |
| Rainier Beach | 13 | 0 | 1.000 | 24 | 4 | 0.857 |
| Seattle Prep | 10 | 3 | 0.769 | 17 | 10 | 0.630 |
| West Seattle | 6 | 7 | 0.462 | 8 | 12 | 0.400 |
| Nathan Hale | 4 | 9 | 0.308 | 5 | 13 | 0.278 |
| Holy Names | 0 | 13 | 0.000 | 0 | 14 | 0.000 |
Division II (Sound)
| League | Season | |||||
| Won | Lost | Pct | Won | Lost | Pct | |
| Lakeside (Seattle) | 12 | 1 | 0.923 | 26 | 2 | 0.929 |
| Chief Sealth | 9 | 4 | 0.692 | 9 | 6 | 0.600 |
| Eastside Catholic | 5 | 8 | 0.385 | 7 | 13 | 0.350 |
| Ballard | 5 | 8 | 0.385 | 6 | 14 | 0.300 |
| Cleveland | 1 | 12 | 0.077 | 1 | 15 | 0.062 |
For league: 18 - 25 in non-league games
129 games; average margin: 23.95
median margin: 18
21 games five points or less margin (including overtime games)
39 games ten points or less margin (including overtime games)
61 league games; average margin: 30.82
median margin: 28
8 games five points or less margin (including overtime games)
13 games ten points or less margin (including overtime games)
| 11/28/89 | Nathan Hale 43, Evergreen (Highline) 38 | Non-league |
| 11/28/89 | Roosevelt 49, Ballard 42 | Non-league |
| 11/29/89 | Bothell 56, Nathan Hale 24 | Non-league |
| 11/29/89 | Lindbergh 57, Eastside Catholic 32 | Non-league |
| 11/29/89 | Tyee 40, Ballard 28 | Non-league |
| 12/01/89 | Edmonds 56, Eastside Catholic 44 | Non-league |
| 12/01/89 | Seattle Prep 61, Interlake 37 | Non-league |
| 12/01/89 | Tyee 41, Cleveland 28 | Non-league |
| 12/02/89 | Lakeside (Seattle) 90, Mountlake Terrace 19 | Non-league |
| 12/04/89 | Rainier Beach 58, Juanita 35 | Non-league |
| 12/05/89 | Interlake 50, Eastside Catholic 17 | Non-league |
| 12/06/89 | Eastside Catholic 45, Mountlake Terrace 36 | Non-league |
| 12/06/89 | Lakeside (Seattle) 53, Sammamish 25 | Non-league |
| 12/06/89 | Mercer Island 54, Ballard 16 | Non-league |
| 12/06/89 | Seattle Prep 51, Monroe 38 | Non-league |
| 12/07/89 | Ingraham 40, Nathan Hale 19 | Non-league |
| 12/08/89 | Ballard 40, Edmonds 39 | Non-league |
| 12/08/89 | Lakeside (Seattle) 47, Woodway 45 | Non-league |
| 12/08/89 | Meadowdale 52, Seattle Prep 51 | Non-league |
| 12/08/89 | Tolt 50, Cleveland 31 | Non-league |
| 12/12/89 | at Lakeside (Seattle) 62, Chief Sealth 33 | |
| 12/12/89 | Eastside Catholic 55, at Cleveland 40 | |
| 12/12/89 | at West Seattle 58, Holy Names 18 | |
| 12/12/89 | Rainier Beach 72, at Ballard 30 | |
| 12/12/89 | Seattle Prep 46, at Nathan Hale 19 | |
| 12/15/89 | Ballard 48, at Eastside Catholic 44 | |
| 12/15/89 | at Lakeside (Seattle) 79, Cleveland 18 | |
| 12/15/89 | Nathan Hale W, at Holy Names L | |
| 12/15/89 | Rainier Beach 73, Lake Washington 37 | Non-league |
| 12/15/89 | at Chief Sealth W, West Seattle L | |
| 12/16/89 | Mariner 61, Seattle Prep 51 | Non-league |
| 12/16/89 | Marysville-Pilchuck 46, Ballard 37 | Non-league |
| 12/18/89 | Newport (Bellevue) 71, West Seattle 41 | Non-league |
| 12/18/89 | Rainier Beach 60, Franklin 48 | Non-league |
| 12/19/89 | Mercer Island 46, Chief Sealth 36 | Non-league |
| 12/19/89 | Seattle Prep 52, Mountlake Terrace 40 | Non-league |
| 12/20/89 | Lake Washington 90, Holy Names 16 | Non-league |
| 12/21/89 | Kennedy 66, West Seattle 52 | Non-league |
| 12/26/89 | Lakeside (Seattle) 64, Centennial (BC) 33 | Non-league |
| 12/27/89 | Lakeside (Seattle) 72, Pueblo (AZ) 26 | Non-league |
| 12/27/89 | Meadowdale 69, Ballard 36 | Non-league |
| 12/27/89 | Mountlake Terrace 48, Nathan Hale 30 | Non-league |
| 12/28/89 | Edmonds 55, Nathan Hale 34 | Non-league |
| 12/28/89 | Lakeside (Seattle) 63, St. Pat's (ON) 45 | Non-league |
| 12/28/89 | Lynnwood (CA) 62, Rainier Beach 58 | Non-league |
| 12/29/89 | at Rainier Beach 60, Franklin 49 | Non-league |
| 12/29/89 | Interlake 48, Eastside Catholic 41 | Non-league |
| 12/29/89 | Lakeside (Seattle) 57, St. John's (ON) 36 | Non-league |
| 12/30/89 | Lynwood (CA) 62, at Rainier Beach 56 | Non-league |
| 01/03/90 | Blanchet 52, at Seattle Prep 43 | Non-league |
| 01/04/90 | Rainier Beach 66, at Seattle Prep 52 | |
| 01/05/90 | Chief Sealth 57, at Cleveland 25 | |
| 01/05/90 | Lakeside (Seattle) 95, at Ballard 22 | |
| 01/05/90 | Rainier Beach 87, at Holy Names 16 | |
| 01/05/90 | Seattle Prep 72, at Eastside Catholic 34 | |
| 01/05/90 | West Seattle 54, at Nathan Hale 51 | |
| 01/10/90 | at Chief Sealth 52, Ballard 32 | |
| 01/10/90 | at Lakeside (Seattle) 89, Eastside Catholic 13 | |
| 01/10/90 | Nathan Hale 58, at Cleveland 45 | |
| 01/10/90 | Seattle Prep 67, at Holy Names 18 | |
| 01/10/90 | at Rainier Beach 60, West Seattle 26 | |
| 01/12/90 | Chief Sealth 65, at Eastside Catholic 48 | |
| 01/12/90 | at Ballard 43, Cleveland 33 | |
| 01/12/90 | Lakeside (Seattle) 84, at Holy Names 11 | |
| 01/12/90 | at Rainier Beach 87, Nathan Hale 31 | |
| 01/12/90 | at Seattle Prep 52, West Seattle 50 | |
| 01/13/90 | West Seattle 55, Cleveland 31 | Non-league |
| 01/17/90 | at Rainier Beach 100, Cleveland 37 | |
| 01/17/90 | at Eastside Catholic 74, Holy Names 28 | |
| 01/17/90 | Lakeside (Seattle) 67, at West Seattle 31 | |
| 01/17/90 | at Chief Sealth 60, Nathan Hale 43 | |
| 01/17/90 | Seattle Prep 70, at Ballard 22 | |
| 01/19/90 | Ballard 68, at Holy Names 53 | |
| 01/19/90 | at West Seattle 64, Eastside Catholic 45 | |
| 01/19/90 | at Lakeside (Seattle) 96, Nathan Hale 29 | |
| 01/19/90 | Rainier Beach 64, at Chief Sealth 38 | |
| 01/19/90 | Seattle Prep 58, at Cleveland 33 | |
| 01/24/90 | at Seattle Prep 55, Chief Sealth 48 | |
| 01/24/90 | Eastside Catholic 58, at Nathan Hale 57 | |
| 01/24/90 | at Cleveland 54, Holy Names 25 | |
| 01/24/90 | at Rainier Beach 64, Lakeside (Seattle) 62 | |
| 01/24/90 | West Seattle 54, at Ballard 20 | |
| 01/26/90 | at Lakeside (Seattle) 59, Ballard 29 | |
| 01/26/90 | at Chief Sealth 46, Cleveland 38 | |
| 01/26/90 | at Seattle Prep 54, Nathan Hale 37 | |
| 01/26/90 | Rainier Beach 90, at Eastside Catholic 38 | |
| 01/26/90 | West Seattle 87, at Holy Names 26 | |
| 01/31/90 | Chief Sealth 57, at Holy Names 29 | |
| 01/31/90 | Eastside Catholic 52, at Ballard 46 | |
| 01/31/90 | Lakeside (Seattle) 79, at Cleveland 36 | |
| 01/31/90 | Rainier Beach 85, at Nathan Hale 41 | |
| 01/31/90 | Seattle Prep 52, at West Seattle 48 | |
| 02/02/90 | Ballard 37, at Nathan Hale 34 | |
| 02/02/90 | at Lakeside (Seattle) 75, Chief Sealth 39 | |
| 02/02/90 | at Eastside Catholic 68, Cleveland 50 | |
| 02/02/90 | at Seattle Prep 76, Holy Names 15 | |
| 02/02/90 | Rainier Beach 84, at West Seattle 46 | |
| 02/07/90 | Ballard 39, at Cleveland 35 | |
| 02/07/90 | at Chief Sealth W, Eastside Catholic L | |
| 02/07/90 | at Rainier Beach 2, Holy Names 0 | |
| 02/07/90 | Nathan Hale 46, at West Seattle 38 | |
| 02/07/90 | at Lakeside (Seattle) 64, Seattle Prep 41 | |
| 02/09/90 | Chief Sealth 47, at Ballard 32 | |
| 02/09/90 | at West Seattle 68, Cleveland 46 | |
| 02/09/90 | at Nathan Hale 68, Holy Names 25 | |
| 02/09/90 | Lakeside (Seattle) 82, at Eastside Catholic 27 | |
| 02/09/90 | at Rainier Beach 81, Seattle Prep 54 | |
| 02/12/90 | Eastside Catholic 56, Ballard 45 | Metro AA Sound tiebreaker (3rd/loser out) |
| 02/14/90 | at Seattle Prep 49, Eastside Catholic 47 | Metro AA Tournament |
| 02/14/90 | West Seattle 51, Chief Sealth 41 | Metro AA Tournament (loser out) |
| 02/17/90 | Rainier Beach 60, Lake Quinault 52 | D4 B Tournament |
| 02/20/90 | Lakeside (Seattle) 45, Rainier Beach 43 | Metro AA Tournament (1st/2nd) |
| 02/20/90 | Seattle Prep 61, West Seattle 57 | Metro AA Tournament (3rd/4th) |
| 02/22/90 | Lakeside (Seattle) 61, Renton 37 | D2 AA Tournament |
| 02/22/90 | Seattle Prep 59, Lindbergh 54 | D2 AA Tournament |
| 02/23/90 | Rainier Beach 67, Mount Rainier 29 | D2 AA Tournament |
| 02/23/90 | Kennedy 65, West Seattle 31 | D2 AA Tournament |
| 02/24/90 | Mount Rainier 53, West Seattle 46 | D2 AA Tournament (loser out) |
| 02/24/90 | Rainier Beach 89, Kennedy 49 | D2 AA Tournament (winner to state) |
| 02/24/90 | Lakeside (Seattle) 58, Seattle Prep 24 | D2 AA Tournament (winner to state) |
| 02/28/90 | Seattle Prep 55, Mount Rainier 54 | D2 AA Tournament (winner to state/loser out) |
| 03/02/90 | Kennedy 35, Seattle Prep 34 | D2 AA Tournament (3rd/4th) |
| 03/03/90 | Rainier Beach 59, Lakeside (Seattle) 56 | D2 AA Tournament (1st/2nd) |
| 03/07/90 | Bainbridge 46, Rainier Beach 40 | State AA Tournament |
| 03/07/90 | Lakeside (Seattle) 59, Enumclaw 42 | State AA Tournament |
| 03/07/90 | Woodway 37, Seattle Prep 33 | State AA Tournament |
| 03/08/90 | Lakeside (Seattle) 56, Colville 38 | State AA Tournament |
| 03/08/90 | Rainier Beach 55, West Valley (Yakima) 37 | State AA Tournament (loser out) |
| 03/08/90 | Sunnyside 59, Seattle Prep 42 | State AA Tournament (loser out) |
| 03/09/90 | Lakeside (Seattle) 61, Aberdeen 53 | State AA Tournament |
| 03/09/90 | Rainier Beach 47, Battle Ground 35 | State AA Tournament (loser out) |
| 03/10/90 | Lakeside (Seattle) 57, Kennedy 33 | State AA Tournament (1st/2nd) |
| 03/10/90 | Rainier Beach 60, Sunnyside 43 | State AA Tournament (5th/8th) |