Orillia Terriers
These playoffs determined the Eastern Canadian finalist in the 1973 Allan Cup final.
Champions[]
- Northern Ontario: Thunder Bay Twins
- Ontario: Orillia Terriers
- Newfoundland and Labrador: St. John's Capitals
Semi Final[]
Best of 5
- Thunder Bay 6 St. John's 4
- St. John's 6 Thunder Bay 3
- Thunder Bay 6 St. John's 4
- Thunder Bay 6 St. John's 4
Thunder Bay Twins beat St. John's Capitals 3 wins to 1.
Final[]
Best of 5
- Orillia 8 Thunder Bay 2
- Thunder Bay 7 Orillia 5
- Thunder Bay 3 Orillia 1
- Orillia 4 Thunder Bay 2
- Orillia 7 Thunder Bay 0
Orillia Terriers beat Thunder Bay Twins 3 wins to 2.
Orillia Terriers advanced to the 1973 Allan Cup Final.