| Year | Team Name | League | Division | Affilate | W | L | Pct | Rank | Managers | Stadium | Playoffs | |
| 2010 | Portland | Beavers | PCL | Pacific North | SD | 59 | 85 | .410 | 4 | Terry Kennedy | PGE Park | dnq |
| 2009 | Portland | Beavers | PCL | Pacific North | SD | 60 | 84 | .417 | 4 | Randy Ready | PGE Park | dnq |
| 2008 | Portland | Beavers | PCL | Pacific North | SD | 70 | 74 | .486 | 4 | Randy Ready | PGE Park | dnq |
| 2007 | Portland | Beavers | PCL | Pac-North | SD | 58 | 86 | .403 | 4 | Rich Renteria | PGE Park | dnq |
| 2006 | Portland | Beavers | PCL | Pacific North | SD | 68 | 76 | .472 | 3 | Craig Colbert | PGE Park | dnq |
| 2005 | Portland | Beavers | PCL | Pacific North | SD | 70 | 73 | .490 | 3 | Craig Colbert | PGE Park | dnq |
| 2004 | Portland | Beavers | PCL | Northern | SD | 84 | 60 | .583 | 1 | Craig Colbert | PGE Park | Lost in Semi-Finals |
| 2003 | Portland | Beavers | PCL | Northern | SD | 69 | 75 | .479 | 2 | Rick Sweet | PGE Park | dnq |
| 2002 | Portland | Beavers | PCL | Northern | SD | 72 | 71 | .503 | 2 | Rick Sweet | PGE Park | dnq |
| 2001 | Portland | Beavers | PCL | North | SD | 71 | 73 | .493 | 3 | Rick Sweet | PGE Park | dnq |
| 1993 | Portland | Beavers | PCL | Northern | MIN | 87 | 56 | .608 | 1 | Scott Ullger | Civic Stadium | Lost in Finals |
| 1992 | Portland | Beavers | PCL | Northern | MIN | 83 | 61 | .576 | 1 | Scott Ullger | Civic Stadium | Lost in Semi-Finals |
| 1991 | Portland | Beavers | PCL | Northern | MIN | 70 | 68 | .507 | 3 | Russ Nixon | Civic Stadium | Lost in Semi-Finals |
| 1990 | Portland | Beavers | PCL | Northern | MIN | 56 | 83 | .403 | 5 | Phil Roof | Civic Stadium | dnq |
| 1989 | Portland | Beavers | PCL | Northern | MIN | 72 | 72 | .500 | 3 | Phil Roof | Civic Stadium | dnq |
| 1988 | Portland | Beavers | PCL | Northern | MIN | 76 | 66 | .535 | 2 | Jim Mahoney Jim Shellenback | Civic Stadium | Lost in Semi-Finals |
| 1987 | Portland | Beavers | PCL | Northern | MIN | 45 | 96 | .319 | 5 | Charlie Manuel | Civic Stadium | dnq |
| 1986 | Portland | Beavers | PCL | Northern | PHI | 68 | 73 | .482 | 4 | Bill Dancy | Civic Stadium | dnq |
| 1985 | Portland | Beavers | PCL | Northern | PHI | 68 | 74 | .479 | 3 | Bill Dancy | Civic Stadium | dnq |
| 1984 | Portland | Beavers | PCL | Northern | PHI | 62 | 78 | .443 | 5 | Lee Elia | Civic Stadium | dnq |
| 1983 | Portland | Beavers | PCL | Northern | PHI | 75 | 67 | .528 | 2 | John Felske | Civic Stadium | League Champions |
| 1982 | Portland | Beavers | PCL | Northern | PIT | 65 | 79 | .451 | 5 | Tom Trebelhorn | Civic Stadium | dnq |
| 1981 | Portland | Beavers | PCL | Northern | PIT | 72 | 65 | .526 | 3 | Pete Ward | Civic Stadium | dnq |
| 1980 | Portland | Beavers | PCL | Northern | PIT | 69 | 76 | .476 | 4 | Jim Mahoney | Civic Stadium | dnq |
| 1979 | Portland | Beavers | PCL | Northern | PIT | 73 | 74 | .497 | 3 | Johnny Lipon | Civic Stadium | dnq |
| 1978 | Portland | Beavers | PCL | Western | CLE | 76 | 62 | .551 | 2 | Gene Dusan | Civic Stadium | dnq |
| 1977 | Portland | Mavericks | Nwst | Independent | - | 44 | 22 | .667 | 1 | dnq | ||