The Ottawa Senators reverted to the name "Ottawa Rough Riders."[1]
The Canadian Rugby Union approved the forward pass for all leagues and the first touchdown 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 five-yard line, and the point could be scored by a drop-kick, place kick, run or pass.
The Montreal AAA Winged Wheelers were the first team outside Ontario to win the Grey Cup after shutting out the Regina Roughriders.[2]
Regular season
Final regular season standings
Note: GP = Games Played, W = Wins, L = Losses, T = Ties, PF = Points For, PA = Points Against, Pts = Points
*Bold text means that they have clinched the playoffs.
* Victoria Games worth 4 points in standings
[3][4][5]
League Champions
Grey Cup playoffs
Note: All dates in 1931
ORFU final
- Sarnia advances to the East Semifinal.[6]
 
East semifinal
- Western Ontario advances to the East Final.[7]
 
East final
- Montreal advances to the Grey Cup game.
 
Western semifinals
- Calgary won the total-point series by 20–5. Calgary advances to the Western Final.
 
- Regina advances to the Western Final.
 
West Finals
- Regina advances to the Grey Cup game.
 
Playoff bracket
 | Quarterfinals
 |  |  | Semifinals
 |  |  | Grey Cup final
 |  | 
 |   |   |   |  |  |   |   |   |  |  |   |   |   |  | 
 | IRFU
 | Montreal AAA Winged Wheelers
 | 
 |  |  |  | 
 | 
 | 
 | BYE
 | 
 |  | 
 |  | IRFU
 | Montreal AAA Winged Wheelers
 | 22
 |  | 
 | EAST
 |  | 
 |  |  | CIRFU
 | University of Western Ontario
 | 0
 |  | 
 | CIRFU
 | University of Western Ontario
 | 7
 |  | 
 |  | 
 | ORFU
 | Sarnia Imperials
 | 1
 |  | 
 |  | IRFU
 | Montreal AAA Winged Wheelers
 | 22
 |  | 
 | 
 |  | 
 |  |  | SRFU
 | Regina Roughriders
 | 0
 |  | 
 | ARFU
 | Calgary Altomahs
 | 6-14
 |  |  | 
 |  | 
 | BCRFU
 | Vancouver Athletic Club
 | 4-1
 |  | 
 |  | ARFU
 | Calgary Altomahs
 | 2
 |  | 
 | WEST
 |  | 
 |  |  | SRFU
 | Regina Roughriders
 | 26
 |  | 
 | SRFU
 | Regina Roughriders
 | 47
 |  | 
 |  | 
 | MRFU
 | Winnipeg St.John's
 | 7
 |  | 
Grey Cup Championship
References
- ^ 2009 Canadian Football League Facts, Figures & Records, Canadian Football League Properties/Publications, Toronto, Ontario, ISBN 978-0-9739425-4-5, p.282-283
 
- ^ "Grey Cup Memories: 1931". CFL.ca. 2005-10-05. Retrieved 2019-10-05.
 
- ^ 2009 Canadian Football League Facts, Figures & Records, Canadian Football League Properties/Publications, Toronto, Ontario, ISBN 978-0-9739425-4-5, p.293
 
- ^ https://news.google.com/newspapers?id=jPcqAAAAIBAJ&sjid=TowFAAAAIBAJ&pg=6018%2C2188139 The Montreal Gazette – November 16, 1931
 
- ^ https://news.google.com/newspapers?id=iPcqAAAAIBAJ&sjid=TowFAAAAIBAJ&pg=5374%2C1174471  The Montreal Gazette – November 9, 1931
 
- ^ https://news.google.com/newspapers?id=jPcqAAAAIBAJ&sjid=TowFAAAAIBAJ&pg=6637%2C2179143 The Montreal Gazette – November 16, 1931
 
- ^ https://news.google.com/newspapers?id=kfcqAAAAIBAJ&sjid=TowFAAAAIBAJ&pg=6559%2C3212098 The Montreal Gazette – November 23, 1931