| 1949 | Edmonton Eskimos began play |
| 1954 | British Columbia Lions began play |
| 1982 | Montreal Alouettes became Montreal Concordes |
| 1986 | Montreal Concordes became Montreal Alouettes |
| 1987 | Montreal Alouettes folded |
| 1987 | Winnipeg Blue Bombers moved from West to East Division |
| 1993 | Sacramento Gold Miners began play |
| 1994 | Baltimore CFLers began play |
| 1994 | Las Vegas Posse began play |
| 1994 | Shreveport Pirates began play |
| 1995 | Birmingham Barracudas began play |
| 1995 | San Antonio Texans began play |
| 1995 | Sacrameto Gold Miners folded |
| 1995 | Las Vegas Posse folded |
| 1995 | Memphis Mad Dogs began play |
| 1995 | Baltimore CFLers became Baltimore Stallions |
| 1996 | Birmingham Barracudas folded |
| 1996 | San Antonio Texans folded |
| 1996 | Memphis Mad Dogs folded |
| 1996 | Shreveport Pirates folded |
| 1996 | Baltimore Stallions became Montreal Alouettes |
| 1997 | Ottawa Rough Riders folded |
| 1997 | Winnipeg Blue Bombers moved from West to East Division |
| 2002 | Ottawa Renegades began play |
| 2006 | Ottawa Renegades folded |
| 2014 | Ottawa Redblacks began play |
| 2014 | Winnipeg Blue Bombers moved from East to West Division |
| 2021 | Edmonton Eskimos became Edmonton Elks |
| |
| List of abbreviations used in other pages: |
| Baltimore | Bal | Baltimore Stallions (1994 - 1995) |
| Birmingham | Bir | Birmingham Barracudas (1995) |
| British Columbia | BC | British Columbia Lions (1954 - present) |
| Calgary | Cgy | Calgary Stampeders (1947 - present) |
| Edmonton | Edm | Edmonton Eskimos/Elks (1949 - present) |
| Hamilton | Ham | Hamilton Tiger Cats (1947 - present) |
| Las Vegas | LV | Las Vegas Posse (1994) |
| Memphis | Mem | Memphis Mad Dogs (1995) |
| Montreal | Mtl | Montreal Alouettes (1947-1981, 1986, 1996-present) |
| Mtl Concordes | MtC | Montreal Concordes (1982 - 1985) |
| Ottawa | Ott | Ottawa Redblacks (2014 - present) |
| Ott Renegades | OtR | Ottawa Renegades (2002 - 2005) |
| Ott RghRiders | ORR | Ottawa Rough Riders (1947 - 1996) |
| Sacramento | Sac | Sacramento Gold Miners (1993 - 1994) |
| San Antonio | SA | San Antonio Texans (1995) |
| Saskatchewan | Ssk | Saskatchewan Roughriders (1947 - present) |
| Shreveport | Shr | Shreveport Pirates (1994 - 1995) |
| Toronto | Tor | Toronto Argonauts (1947 - present) |
| Winnipeg | Wpg | Winnipeg Blue Bombers (1947 - present) |
