North
| League | Season | ||||||
| Won | Lost | Pct | Won | Lost | Pct | ||
| Capital | 12 | 2 | 0.857 | 17 | 4 | 0.810 | |
| Tumwater | 12 | 2 | 0.857 | 18 | 7 | 0.720 | State |
| Aberdeen | 11 | 3 | 0.786 | 17 | 8 | 0.680 | State |
| Shelton | 5 | 9 | 0.357 | 10 | 10 | 0.500 | |
| Olympia | 5 | 9 | 0.357 | 9 | 10 | 0.474 | |
South
| League | Season | ||||||
| Won | Lost | Pct | Won | Lost | Pct | ||
| Centralia | 12 | 3 | 0.800 | 18 | 5 | 0.783 | |
| W.F. West | 9 | 6 | 0.600 | 11 | 10 | 0.524 | |
| Camas | 6 | 9 | 0.400 | 7 | 13 | 0.350 | |
| Mark Morris | 5 | 10 | 0.333 | 5 | 14 | 0.263 | |
| Washougal | 2 | 13 | 0.133 | 4 | 15 | 0.211 | |
| R.A. Long | 1 | 14 | 0.067 | 1 | 15 | 0.062 | |
Last Season: 1997-1998 Rivers
Next Season: 1999-2000 Greater St. Helens 3A | 1999-2000 Pacific Nine
1998-1999 boys Rivers | Main Page | 1998-1999 TOC
For league: 29 - 19 in non-league games
Home team wins 47.8% of league games (33 - 36)
136 games; average margin: 14.96
median margin: 13
25 games five points or less margin (including overtime games)
57 games ten points or less margin (including overtime games)
79 league games; average margin: 15.61
median margin: 13
17 games five points or less margin (including overtime games)
31 games ten points or less margin (including overtime games)
| 11/30/98 | Centralia 61, at Washington 52 | Non-league |
| 12/01/98 | Capital 55, Curtis 52 | Non-league |
| 12/02/98 | Centralia 52, at North Mason 38 | Non-league |
| 12/02/98 | Shelton 54, River Ridge 46 | Non-league |
| 12/02/98 | at Eatonville 49, W.F. West 43 | Non-league |
| 12/03/98 | Capital 51, Elma 34 | Non-league |
| 12/03/98 | at Kelso 43, Mark Morris 33 | Non-league |
| 12/03/98 | Washougal at Stevenson | Non-league |
| 12/04/98 | Columbia River 47, at Camas 36 | Non-league |
| 12/04/98 | at Tumwater 70, Evergreen (Vancouver) 58 | Non-league |
| 12/04/98 | at Shelton 36, W.F. West 34 | Non-league |
| 12/04/98 | White River 58, Aberdeen 41 | Non-league |
| 12/04/98 | at Centralia 69, Yelm 39 | Non-league |
| 12/05/98 | at Olympia 50, Mark Morris 27 | Non-league |
| 12/05/98 | at Tumwater 69, North Thurston 56 | Non-league |
| 12/07/98 | Gig Harbor 46, at W.F. West 36 | Non-league |
| 12/07/98 | Aberdeen 68, Montesano 35 | Non-league |
| 12/07/98 | at Centralia 83, River Ridge 36 | Non-league |
| 12/07/98 | at Washougal 59, Stevenson 55 | Non-league |
| 12/08/98 | Black Hills 49, Tumwater 40 | Non-league |
| 12/08/98 | at Evergreen (Vancouver) 45, Camas 32 | Non-league |
| 12/08/98 | North Thurston 57, Olympia 52 | Non-league |
| 12/08/98 | at Wilson 49, Shelton 40 | Non-league |
| 12/10/98 | at W.F. West 41, Kelso 29 | Non-league |
| 12/10/98 | The Dalles (OR) at Camas | Non-league |
| 12/11/98 | Aberdeen 57, at Mark Morris 38 | Non-league |
| 12/11/98 | Elma 70, Tumwater 64 | Non-league |
| 12/11/98 | at Olympia 52, Evergreen (Vancouver) 45 | Non-league |
| 12/11/98 | at Shelton 77, North Mason 51 | Non-league |
| 12/12/98 | at Camas 49, Ridgefield 38 | Non-league |
| 12/15/98 | Aberdeen 59, Olympia 42 | |
| 12/15/98 | Camas 57, at R.A. Long 42 | |
| 12/15/98 | Centralia 57, at Washougal 41 | |
| 12/15/98 | at Capital 57, Shelton 46 | |
| 12/15/98 | W.F. West 47, at Mark Morris 31 | |
| 12/18/98 | Shelton 59, at North Kitsap 49 | Non-league |
| 12/19/98 | Washougal at Ilwaco | Non-league |
| 12/22/98 | Aberdeen 60, at Federal Way 55 OT | Non-league |
| 12/29/98 | at Clatskanie (OR) 51, Camas 33 | Non-league |
| 12/29/98 | at Centralia 54, Eatonville 33 | Non-league |
| 12/29/98 | at Olympia 55, Olympic 47 | Non-league |
| 12/29/98 | South Kitsap 61, at Aberdeen 40 | Non-league |
| 12/29/98 | Onalaska 55, Washougal 38 | Non-league |
| 12/29/98 | Woodinville 54, at Mark Morris 46 | Non-league |
| 12/30/98 | at W.F. West 46, Eatonville 36 | Non-league |
| 12/30/98 | at Shelton 60, Timberline 50 | Non-league |
| 12/30/98 | Washougal 67, Tenino 52 | Non-league |
| 01/02/99 | Olympia 72, River Ridge 64 | Non-league |
| 01/05/99 | Capital 63, Eatonville 44 | Non-league |
| 01/05/99 | Centralia 59, at Camas 29 | |
| 01/05/99 | Olympia 39, at Shelton 35 | |
| 01/05/99 | at W.F. West 50, R.A. Long 42 | |
| 01/05/99 | at Aberdeen 65, Tumwater 61 | |
| 01/05/99 | at Mark Morris 59, Washougal 48 | |
| 01/08/99 | Aberdeen 56, at Shelton 43 | |
| 01/08/99 | Centralia 73, at Mark Morris 51 | |
| 01/08/99 | Tumwater 88, at Capital 80 2OT | |
| 01/08/99 | W.F. West 50, at Camas 43 | |
| 01/08/99 | Washougal 59, at R.A. Long 57 | |
| 01/12/99 | Camas 51, at Washougal 37 | |
| 01/12/99 | at Capital 50, Olympia 48 | |
| 01/12/99 | at Mark Morris 60, R.A. Long 54 | |
| 01/12/99 | at Tumwater 63, Shelton 47 | |
| 01/12/99 | W.F. West 53, at Centralia 46 OT | |
| 01/15/99 | Aberdeen 62, at Camas 45 | |
| 01/15/99 | at Tumwater 58, Centralia 48 | |
| 01/15/99 | at Capital 63, Mark Morris 47 | |
| 01/15/99 | Olympia 64, R.A. Long 49 | |
| 01/15/99 | Shelton 48, W.F. West 42 | |
| 01/15/99 | Woodland 69, Washougal 43 | Non-league |
| 01/19/99 | at Centralia 55, Aberdeen 50 | |
| 01/19/99 | Camas 47, at Olympia 41 | |
| 01/19/99 | Capital 51, W.F. West 50 | |
| 01/19/99 | at Shelton 61, R.A. Long 35 | |
| 01/19/99 | at Tumwater 69, Washougal 45 | |
| 01/21/99 | Kelso 60, at R.A. Long 47 | Non-league |
| 01/22/99 | Aberdeen 92, at Washougal 51 | |
| 01/22/99 | Capital 76, at R.A. Long 43 | |
| 01/22/99 | Centralia 46, at Olympia 33 | |
| 01/22/99 | Shelton 52, at Camas 39 | |
| 01/22/99 | Tumwater 67, at Mark Morris 47 | |
| 01/25/99 | at Capital 55, Camas 29 | |
| 01/25/99 | Centralia 70, at Shelton 69 | |
| 01/25/99 | at Aberdeen 70, Mark Morris 30 | |
| 01/25/99 | Olympia 62, at Washougal 42 | |
| 01/25/99 | at Tumwater 61, W.F. West 46 | |
| 01/28/99 | at Capital 61, Centralia 44 | |
| 01/28/99 | Olympia defeated at Mark Morris | |
| 01/28/99 | at Aberdeen 44, W.F. West 39 | |
| 01/28/99 | at Shelton 69, Washougal 43 | |
| 01/29/99 | at Tumwater 74, R.A. Long 25 | |
| 02/01/99 | Aberdeen 68, R.A. Long 47 | |
| 02/01/99 | Capital 70, at Washougal 28 | |
| 02/01/99 | Tumwater 73, at Camas 50 | |
| 02/01/99 | W.F. West 45, at Olympia 35 | |
| 02/02/99 | Shelton 54, at Mark Morris 48 | |
| 02/04/99 | Aberdeen 55, Olympia 41 | |
| 02/04/99 | Capital 84, at Shelton 48 | |
| 02/04/99 | at Camas 38, R.A. Long 36 | |
| 02/04/99 | Tumwater 85, Elma 59 | Non-league |
| 02/04/99 | at Centralia 79, Washougal 47 | |
| 02/05/99 | Mark Morris 37, W.F. West 33 | |
| 02/08/99 | at Capital 59, Aberdeen 53 | |
| 02/08/99 | Centralia 73, at R.A. Long 42 | |
| 02/08/99 | Tumwater 52, Olympia 38 | |
| 02/08/99 | W.F. West 50, Washougal 37 | |
| 02/09/99 | at Mark Morris 56, Camas 35 | |
| 02/11/99 | at Tumwater 72, Aberdeen 54 | |
| 02/11/99 | at Centralia 68, Camas 28 | |
| 02/11/99 | Capital 62, Fife 45 | Non-league |
| 02/11/99 | at Washougal 41, Mark Morris 39 | |
| 02/11/99 | at Olympia 67, Shelton 60 | |
| 02/11/99 | W.F. West 49, at R.A. Long 31 | |
| 02/16/99 | W.F. West 43, Camas 30 | |
| 02/16/99 | Capital 61, at Tumwater 51 | |
| 02/16/99 | at Centralia 42, Mark Morris 32 | |
| 02/16/99 | R.A. Long 61, at Washougal 59 | |
| 02/16/99 | at Aberdeen 67, Shelton 57 | |
| 02/18/99 | Capital 61, at Olympia 44 | |
| 02/18/99 | Tumwater 61, at Shelton 56 | |
| 02/18/99 | at Camas 55, Washougal 44 | |
| 02/19/99 | Centralia 40, at W.F. West 38 | |
| 02/19/99 | Mark Morris 48, at R.A. Long 38 | |
| 02/22/99 | at Centralia 66, R.A. Long 39 | |
| 02/23/99 | at Aberdeen 52, Capital 50 | |
| 02/23/99 | at Camas 41, Mark Morris 20 | |
| 02/23/99 | Tumwater 75, Olympia 63 | |
| 02/23/99 | W.F. West 89, at Washougal 42 | |
| 02/26/99 | Capital 53, Tumwater 49 | Rivers tiebreaker (1st/2nd) |
| 03/01/99 | Aberdeen 54, W.F. West 36 | D4 3A Tournament (loser out) |
| 03/01/99 | Tumwater 57, Camas 35 | D4 3A Tournament (loser out) |
| 03/02/99 | Aberdeen 60, Capital 51 | D4 3A Tournament |
| 03/02/99 | Tumwater 75, Centralia 67 | D4 3A Tournament |
| 03/04/99 | Centralia 67, Capital 50 | D4 3A Tournament (loser out) |
| 03/04/99 | Tumwater 43, Aberdeen 40 | D4 3A Tournament (winner 1st to state) |
| 03/06/99 | Aberdeen 52, Centralia 49 | D4 3A Tournament (winner 2nd to state/loser out) |
| 03/10/99 | Mount Vernon 52, Aberdeen 38 | State 3A Tournament |
| 03/10/99 | Cheney 60, Tumwater 34 | State 3A Tournament |
| 03/11/99 | Arlington 59, Aberdeen 30 | State 3A Tournament (loser out) |
| 03/11/99 | White River 67, Tumwater 57 | State 3A Tournament (loser out) |