1990 Manitoba Senior AAA Playoffs

For the 1989-90 season, the Manitoba Amateur Hockey Association awarded the Manitoba Senior AAA Championship, the Pattison Cup, to the winner of the Central Amateur Senior Hockey League.

see 1989-90 Central Amateur Senior Hockey League Season

For the first time in history, the Pattison Cup champs headed east in Allan Cup play, the Thunder Bay Twins won the Pattison Cup & advanced to the 1989-90 Eastern Canada Allan Cup Playoffs. with CASHL runner up St. Boniface Mohawks advancing to the Western Canada Allan Cup Playoffs. Manitoba Senior AAA Hockey History