[citation needed] In the 1926–27 season, the Winnipeg Junior and Juvenile Hockey League became the north division of the MJHL, with Jimmy Dunn as its secretary, convenor and timekeeper at the Olympic Rink.

[8][9] In the 1936–37 season, both the north and south MJHL divisions wanted to play games at the larger Winnipeg Amphitheatre since they could increase their share of the gate receipts.

[13] The 1944–45 season was the first interlocking schedule between the north and south divisions, and the MAHA implemented of limits on the number of player transfers for balanced competition.

They felt that the south division was given preferential treatment, and sought to equally share games at the larger Winnipeg Amphitheatre and the profits from gate receipts.

[18] The Winnipeg Tribune felt that these teams had pursued their own selfish interests with disregard for the general welfare of the league, and that creating the division would perpetuate the previous issues unless a "minor miracle" happened.

[21] When the Brandon Wheat Kings also wanted to play in the SJHL, the MAHA renogotiated the financial arrangement to prevent the loss of another team to an out-of-province league.

In 1961, goalie Ernie Wakely of the Winnipeg Braves was named Canada's outstanding junior hockey player for the month of January.

[citation needed] The MJHL began the 1961–62 season using international ice hockey rules without body checking as an effort to attract more spectators, and hired a new promotional director.

[23] In November 1961, CAHA president Jack Roxburgh ordered the MJHL to revert to standard Canadian rules since it had not been approved by the national body.

In 1963, Jim Irving, captain of the Winnipeg Rangers, was named Manitoba's outstanding junior athlete and received the Carl Pederson Memorial Award.

The league had been reduced to four teams based in the Greater Winnipeg area after the withdrawal of the Brandon Wheat Kings and the Fort Frances Royals.

[25] Dunn supported the change and noted that the concept had produced forward lines on previous Memorial Cup championship teams from Winnipeg.

He felt that the loss of gate receipts from a bye was a financial hardship for the MJHL, and shorten the league's playoffs to accommodate the change approved by the CAHA.

[citation needed] For the 1965–66 MJHL season, Dunn implemented an automatic one-game minimum suspension for any player who received a match penalty.

[8] In 1966–67, future Hall of Famer Bobby Clarke of the Flin Flon Bombers set league records for most goals (71), assists (112), and points (183) in a single season.

[citation needed] During the summer of 1967, the MAHA allowed three teams from Manitoba to enter the new Western Canadian Hockey League (WCHL): the Brandon Wheat Kings and Flin Flon Bombers from the MJHL, and Ben Hatskin's new Winnipeg Jets club.

[33] On Sunday February 9, 1969, the MJHL held a special emergency meeting to discuss Butch Goring leaving the Winnipeg Jets of the WCHL and joining the Dauphin Kings.

Monday, WCHL president Ron Butlin said a court injunction would be sought against Goring and another Jet forward Merv Haney from playing with the Dauphin Kings.

Charlie Simmer of the Kenora Muskies won the scoring title in 1973, the same year the Portage Terriers were crowned National Champs, winning the Centennial Cup.

It was players such as Low, Goring, Chipperfield, Simmer, Chuck Arnason, Murray Bannerman, Paul Baxter, John Bednarski, Rick Blight, Dan Bonar, Brian Engblom, Glen Hanlon, Bob Joyce, Barry Legge, Perry Miller, Chris Oddleifson, Curt Ridley, Rick St. Croix, Blaine Stoughton, and Andy Van Hellemond who gave the new MJHL its foundation.

[citation needed] In September 1971, Winnipeg Monarchs President Bob Westmacott announced 17-year-old Stephan Lindberg of Sweden had been invited to training camp.

[citation needed] On April 5, 1977, MJHL commissioner Bill Addison called off the Turnbull Cup Finals between the Dauphin Kings and Kildonan North Stars, saying "No, I am not going to allow these characters an opportunity to beat on each other any longer.

The decision came just hours after the two clubs had engaged in a pre-game brawl, in which two Kings players were taken to hospital and two North Stars were criminally charged.

The 1980s and 1990s saw the MJHL expand its footprint outside of Winnipeg with the addition of teams in Winkler, Neepawa, Swan River, and three First Nations communities: Sagkeeng, Opaskwayak (The Pas) and Waywayseecappo.

[citation needed] As the Blizzard's dynasty came to an end, the Portage Terriers began their own golden age with a trip to the MJHL finals in 2003–04.

After the league conducted its investigation, commissioner Kim Davis confirmed that a 15-year-old player had come forward with allegations of sexual-based rookie hazing in the team's locker room.

The pandemic also forced the cancellation of the 2020 ANAVET and Centennial Cups, the latter of which was to be played in Portage la Prairie in honour of the national championship's 50th season.

The trophy was donated by the Winnipeg Hockey Club in 1920 to honour Walter James "Ollie" Turnbull, a captain in the 10th Brigade Canadian Field Artillery, who was killed in the First World War.

Since the tournament format for the Centennial Cup began in 1985, MJHL clubs have hosted national championships on three occasions: 1992 in Winnipeg, 2010 in Dauphin, and 2015 in Portage la Prairie.