| Southern Ontario Junior Hockey League |
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In: Brantford Majors
In: Chatham Maroons
In: Detroit Junior Red Wings
In: Guelph C.M.C.'s
In: St. Thomas Elgins
In: Welland Sabres
|
| 1970-71 |
6 Teams |
|
|
In: Sarnia Bees
In: Windsor Spitfires
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| 1971-72 |
8 Teams |
Out: Brantford Majors
Out: Guelph C.M.C.'s
Out: Sarnia Bees
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In: Guelph Biltmore Mad Hatters
In: Niagara Falls Flyers
|
| 1972-73 |
7 Teams |
Out: St. Thomas Elgins
|
In: Buffalo Tondas
In: Michigan Americans
|
| 1973-74 |
8 Teams |
Out: Buffalo Tondas
Out: Michigan Americans
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|
| 1974-75 |
6 Teams |
Out: Detroit Junior Red Wings
Out: Windsor Spitfires
|
In: Mount Hamilton A's
In: Owen Sound Greys
|
| 1975-76 |
6 Teams |
Out: Chatham Maroons
Out: Niagara Falls Flyers
| In: Collingwood ???
|
| 1976-77 | 5 Teams |