1957–58 MJHL season

League notes
The League admits the Winnipeg Braves. The Winnipeg Barons Fold. The Winnipeg Rangers move to Brandon, becoming the Brandon Rangers. In January, the Rangers move back and are named the Transcona Rangers.

Playoffs
Semi-Final
 * St. Boniface defeated Braves 3-games-to-2

Turnbull Cup Championship
 * Monarchs lost to St. Boniface 4-games-to-3

Western Memorial Cup Semi-Final
 * St. Boniface defeated Fort William Canadiens (TBJHL) 4-games-to-1

Western Memorial Cup Final (Abbott Cup)
 * St. Boniface lost to Regina Pats (SJHL) 4-games-to-2