1926 - British Columbia Rugby Football Union was formed on Wednesday,September 1st.

1927 - Western Canada Intercollegiate Union was formed. Ottawa reverted to the name Rough Riders.

1928 - Tri-City Rugby Football Union was formed on Saturday, August 25th and consisted of Moose Jaw, Regina and Winnipeg. The Union disbanded the following year because of travel expenses. Saskatchewan and Winnipeg re-formed their unions. First radio play-by-play broadcast of a Grey Cup Game was on Sunday, December 1st. Hamilton Tigers shutout Regina Roughriders 30-0 before a crowd of 4,767 at the Hamilton Amateur Athletic Association Grounds.

1929 - CRU adopted use of the forward pass on a limited basis in Junior, Interscholastic, Western Canada Rugby Union, Western Intercollegiate Union and the Grey Cup final. First legal pass in Canada was thrown by Gerry Seiberling and the first reception was by Ralph Losie of Calgary Altomah-Tigers against Edmonton on Saturday, September 21st. Jersey Jack Campbell of Regina threw the first forward pass in a Grey Cup game and Jerry Erskine made the first reception. First TD pass was by Edmonton's Joe Cook to Pal Power in the second quarter of a game against the University of Alberta on Saturday, September 28th. The first interception return for a touchdown was by Joe Hess of the University of Alberta in the same game when he caught a pass by Cook.

1930 - On Tuesday, June 10th, the Winnipeg Winnipegs Rugby Football Club was formed and adopted the colours of green and white. Winnipeg played its first game against St. John's Rugby Club at Carruthers Park on Saturday, September 13th. St John's won 7-3. On Monday, September 29th in the first game played in Canada under floodlights, the Hamilton Tigers defeated University of British Columbia in an exhibition game at Athletic Park. Thefirst game in Eastern Canada under floodlights was on Wednesday, October 29th between Oshawa and Toronto Balmy Beach in Toronto's Ulster Stadium. The Convert kicking spot was moved from the 35-line to the 25 but only drop kicks were allowed.

1931 - CRU approved the forward pass for all leagues and the first TD pass in Grey Cup history was a Warren Stevens to Kenny Grant play in Montreal's 22-0 win over Regina. Convert scrimmage line was moved to the 5-yard line, and the point could be scored by a drop-kick, place kick, run or pass.

1932 - Calgary Altomah-Tigers became the Altomahs. Winnipeg and St. Johns amalgamated to field a stronger team, and adopt the colours of blue and gold.

1934 - Edward (Red) Tellier of Montreal, who had been suspended for life for attacking George Gilhooley of Regina in the 1931 Grey Cup final, was re-instated. Eastern Intercollegiate Union formally withdrew from Grey Cup competition. The horn was introduced to officiating.

1935 - For the first time a Western team won the Grey Cup. Winnipeg Pegs (they weren't Blue Bombers for another year) defeated Hamilton Tigers 18-12 at Hamilton. Calgary became the Bronks.

1936 - Teams were restricted to a maximum of five imports and only players who had lived in Canada for a full year could compete in the Grey Cup Game. The Western Interprovincial Football Union (WIFU) was formed with Winnipeg Blue Bombers, Calgary Bronks and Regina Roughriders. IRFU and WIFU adopt playoff format of a two-game total-point series between 1st and 2nd place teams. A white ball was used for games played under floodlights in Western Canada. Intercollegiate teams stop competing for the Grey Cup.

1937 - The Quebec Rugby Football Union discontinued challenging for the Grey Cup.

1938 - Edmonton Eskimos joined the Western Interprovincial Football Union and adopted the colours of blue and white, but withdrew in 1940.

1940 - The only two-game total point series in Grey Cup history was played. Ottawa defeated Toronto Balmy Beach 8-2 and 12-5. The series was arranged by the Canadian Rugby Union when it refused to allow Winnipeg Blue Bombers, the Western winners, to compete in the final because the West had played its season under rules which varied from rules in the East.

1941 - Calgary left the WIFU and Vancouver Grizzlies joined. IRFU was renamed Eastern Canada Union for one season.

1942 - WIFU and IRFU suspended operations for the duration of the War.

1945 - Calgary Bronks changed its name to Stampeders on Friday, September 28th and adopted the colours of blue and gold. IRFU resumed play.

1946 - Montreal Alouettes were organized. WIFU resumed play. Regina Roughriders were renamed Saskatchewan Roughriders. Air travel in football was used for first time. Argos flew to Winnipeg for pre-season games.

1948 - Hamilton Tigers of the IRFU (Big Four), joined the ORFU, and the Hamilton Wildcats of the ORFU joined the Big Four on Friday, April 9th. Saskatchewan Roughriders adopted the colours of green and white. Calgary Stampeders introduced pagentry to the Grey Cup Game with saddle horses and chuck wagons. Calgary reverts to the colours of red and white. Stampeders defeated Ottawa 12-7 for their first Grey Cup victory.

1949 - Edmonton Eskimos rejoined the WIFU and adopted the colours of green and gold. Wearing of helmets was made compulsory. Western Canada Rugby Football Union ceased to exist.