Four years after the hockey program started, St. Michael's were Canadian Amateur Champions, winning the Allan Cup in 1910.

In the 1934 playoffs St. Michael's skated to 8–2, and 9-3 victories versus the Ottawa Shamrocks to win the two-game series for the Ontario title.

The Memorial Cup final was played at Shea's Amphitheatre in Winnipeg, where St. Michael's faced the Edmonton Athletic Club in a best-of-three series for the title.

The Majors picked up Turk Broda from the Winnipeg Monarchs to back up if goaltender Harvey Teno was injured.

[citation needed] St. Michael's made their second trip to the OHA finals in 1937, and again faced the same opponent from in 1934, the Stratford Midgets.

Joe Primeau returned to coach the 1945 Memorial Cup St. Michael's team, after being runners-up in the OHA finals in 1944.

In 1945, Toronto won the J. Ross Robertson Cup, defeating the Galt Black Hawks in four games straight.

They won the sixth game 7-4 behind Joe Sadler's three goals in front of 10,548 fans at Maple Leaf Gardens on April 11.

native Frank Turik scored three hat tricks in the five games to become the tournament's leading goal scorer.

The Majors met up with the Winnipeg Monarchs at Maple Leaf Gardens on April 13 to start the best-of-seven series for the national championship.

Toronto scored a 7 to 4 victory in game five, needing only one more win to be the second team to repeat as Memorial Cup champions.

Game three ended with seven minutes to play in the third period, when the ice was littered for a second time with broken bottles thrown from the stands.

The Basilian fathers lobbied for a shortened schedule for the Majors in the OHA's top tier of junior hockey after the 1958–59 season, since they believed it was too long and detrimental to academic studies for their students.

The Majors won the Eastern Canada final defeating the Moncton Beavers then travelled to Edmonton to play in the 1961 Memorial Cup.

St. Michael's could no longer justify participation in the top tier of the OHA and chose to withdraw from the Ontario Hockey Association Junior A series.

Bauer stated in a 1987 interview that, "We regretted very much leaving because we knew that this [school] is a major recreational institution in this country".

[10] Conn Smythe and the Toronto Maple Leafs wanted to keep the St. Michael's team in operation as a source of players, and then created the Metro Junior A League to help alleviate the college's concerns.

[citation needed] The St. Michael's team finished in first place in the Metro Junior A league, and competed for the J. Ross Robertson Cup again in 1962.

[citation needed] The modern era of the St. Michael's Majors began on August 15, 1996, when the college was admitted to the OHL as an expansion team.

Founded by St. Michael's College School, the team was now owned by Eugene Melnyk, who was the owner of the Ottawa Senators and was CEO of Biovail Corporation.

[citation needed] The Majors played on the smallest ice surface in the OHL, which tended to have a higher average of shots on goal per game than other arenas.

[13] The Majors won the right to host the 2011 Memorial Cup over the Barrie Colts, Kingston Frontenacs and Windsor Spitfires.

[14] The Ontario Hockey League (OHL) announced on May 10, 2010 that the Mississauga St. Michael's Majors were chosen to host the 93rd annual Memorial Cup at the Hershey Centre from May 20–29, 2011.

The Majors hockey uniforms feature a different logo, a large letter "M" on the front, with the school crest (inset right) on the upper left chest, and the St. Michael's cloverleaf patch on the shoulders.

To celebrate the Majors 10th season back in the league, the team launched a new 3rd jersey with the shoulder cloverleaf logo on the front.

The arena is located in uptown Toronto near the intersection of Bathurst Street and St. Clair Avenue behind St. Michael's College School.

[citation needed] In 2003-04 and 2006–07 seasons, the Majors played two home games vs the Ottawa 67's at Scotiabank Place in Kanata, Ontario.