| SEASON | TEAM NAME | OWNER | OVERALL | REGULAR | HOME | AWAY | CONF | DIV | POST | FINISHED |
| 1951-52/1981-82 | Portland Poison | slymonium | 50-38 | 48-34 | 28-13 | 20-21 | 36-22 | 20-20 | 2-4 | 2nd Pac - Lost 1st Round (Hou) |
| 1952-53/1982-83 | Portland Poison | slymonium | 54-40 | 47-35 | 27-14 | 20-21 | 36-22 | 27-13 | 7-5 | 3rd Pac - Lost 2nd Round (StL) |
| 1953-54/1983-84 | Portland Poison | slymonium | 52-41 | 47-35 | 23-18 | 24-17 | 34-24 | 23-17 | 5-6 | 2nd Pac - Lost 2nd Round (StL) |
| 1954-55/1984-85 | Portland Poison | slymonium | 61-32 | 54-28 | 33-8 | 21-20 | 39-19 | 26-14 | 7-4 | 1st Pac - Lost Conf. Final (StL) |
| 1955-56/1985-86 | Portland Poison | slymonium | 64-34 | 52-30 | 29-12 | 23-18 | 40-18 | 28-12 | 12-4 | 1st Pac - Won Championship |
| 1956-57/1986-87 | Portland Poison | slymonium | 55-45 | 46-36 | 26-15 | 20-21 | 37-21 | 30-10 | 9-9 | 3rd Pac - Lost Conf. Final (Chi) |
| 1957-58/1987-88 | Portland Poison | slymonium | 36-46 | 36-46 | 20-21 | 16-25 | 25-33 | 18-22 | 0-0 | 4th Pac - Missed Playoffs |
| 1958-59/1988-89 | Portland Poison | slymonium | 17-65 | 17-65 | 9-32 | 8-33 | 11-47 | 7-33 | 0-0 | 6th Pac - Missed Playoffs |
| 1959-60/1989-90 | Portland Poison | slymonium | 29-53 | 29-53 | 17-24 | 12-29 | 23-35 | 12-28 | 0-0 | 6th Pac - Missed Playoffs |
| 1960-61/1990-91 | Portland Poison | slymonium | 77-20 | 65-17 | 36-5 | 29-12 | 47-11 | 31-9 | 12-3 | 1st Pac - Won Championship |
| 1961-62/1991-92 | Portland Poison | slymonium | 64-31 | 55-27 | 28-13 | 27-14 | 37-21 | 24-16 | 9-4 | 2nd Pac - Lost Conf. Final (Hou) |
| 1962-63/1992-93 | Portland Poison | slymonium | 59-36 | 52-30 | 28-13 | 24-17 | 33-25 | 24-16 | 7-6 | 3rd Pac - Lost 2nd Round (Hou) |
| 1963-64/1993-94 | Portland Poison | slymonium | 29-53 | 29-53 | 18-23 | 11-30 | 19-39 | 14-26 | 0-0 | 6th Pac - Missed Playoffs |
| 1964-65/1994-95 | Portland Poison | slymonium | 58-31 | 55-27 | 31-10 | 24-17 | 37-21 | 25-15 | 3-4 | 2nd Pac - Lost 2nd Round (Mil) |
| 1965-66/1995-96 | Portland Poison | slymonium | 53-34 | 52-30 | 29-12 | 23-18 | 36-22 | 25-15 | 1-4 | 3rd Pac - Lost 1st Round (LA) |
| 1966-67/1996-97 | Portland Poison | slymonium | 23-59 | 23-59 | 16-25 | 7-34 | 16-42 | 11-29 | 0-0 | 6th Pac - Missed Playoffs |
| 1967-68/1997-98 | Portland Poison | slymonium | 60-28 | 58-24 | 31-10 | 27-14 | 40-18 | 28-12 | 2-4 | 1st Pac - Lost 2nd Round (Hou) |
| 1968-69/1998-99 | Portland Poison | slymonium | 69-31 | 58-24 | 33-8 | 25-16 | 40-18 | 28-12 | 11-7 | 2nd Pac - Lost Conf. Final (StL) |
| 1969-70/1999-00 | Portland Poison | slymonium | 57-34 | 52-30 | 31-10 | 21-20 | 35-23 | 23-17 | 5-4 | 3rd Pac - Lost 2nd Round (Hou) |
| 1970-71/2000-01 | Portland Poison | slymonium | 57-36 | 53-29 | 30-11 | 23-18 | 40-18 | 27-13 | 4-7 | 2nd Pac - Lost 2nd Round (Hou) |
| 1971-72/2001-02 | Portland Poison | slymonium | 62-25 | 61-21 | 31-10 | 30-11 | 42-16 | 27-13 | 1-4 | 3rd Pac - Lost 1st Round (Mem) |
| 1972-73/2002-03 | Portland Poison | slymonium | 74-22 | 62-20 | 33-8 | 29-12 | 44-14 | 30-10 | 12-2 | 1st Pac - Won Championship |
| 1973-74/2003-04 | Portland Poison | slymonium | 67-26 | 61-21 | 30-11 | 31-10 | 42-16 | 27-13 | 6-5 | 1st Pac - Lost Conf. Final (Mem) |
| 1974-75/2004-05 | Portland Poison | slymonium | 62-25 | 61-21 | 33-8 | 28-13 | 43-15 | 28-12 | 1-4 | 1st Pac - Lost 2nd Round (Hou) |
| 1975-76/2005-06 | Portland Poison | slymonium | 62-27 | 59-23 | 30-11 | 29-12 | 40-18 | 30-10 | 3-4 | 1st Pac - Lost 2nd Round (Mem) |
| 1976-77/2006-07 | Portland Poison | slymonium | 47-40 | 46-36 | 28-13 | 18-23 | 33-25 | 23-17 | 1-4 | 2nd Pac - Lost 1st Round (Chi) |
| 1977-78/2007-08 | Portland Poison | slymonium | 65-27 | 59-23 | 35-6 | 24-17 | 42-16 | 30-10 | 6-4 | 1st Pac - Lost Conf. Final (NO) |
| 1978-79/2008-09 | Portland Poison | slymonium | 73-26 | 65-17 | 34-7 | 31-10 | 44-14 | 32-8 | 8-9 | 1st Pac - Lost Finals (Pit) |
| 1979-80/2009-10 | Portland Poison | slymonium | 46-41 | 45-37 | 26-15 | 19-22 | 32-26 | 19-21 | 1-4 | 3rd Pac - Lost 1st Round (NO) |
| 1980-81/2010-11 | Portland Poison | slymonium | 69-35 | 53-29 | 32-9 | 21-20 | 38-20 | 27-13 | 16-6 | 2nd Pac - Won Championship |
| Portland Poison | TOTALS | 1651-1081 | 1500-960 | 835-395 | 665-565 | 1061-679 | 724-476 | 151-121 | ||
| SEASON | TEAM NAME | OWNER | OVERALL | REGULAR | HOME | AWAY | CONF | DIV | POST | FINISHED |