Canadian football years, and are not officially defined in the rules. However, among offensive players, the rules recognize three different types of players: Specific offensive positions include: The rules do not constrain how the defence may arrange itself (other than the requirement that they must remain one yard behind the line of scrimmage until the play starts). "Special teams" generally refers to kicking plays, which typically involve a change in possession. Canadian football Canadian football () is a sport played in Canada in which two teams of 12 players each compete for territorial control of a field of play long and wide
Canadian football a CFL game. Canadian football is played at several levels in Canada; the top league is the professional nine-team Canadian Football League (CFL). The CFL regular season begins in June, and playoffs for the Grey Cup are completed by mid-November. In cities with outdoor stadiums such as Edmonton, Winnipeg, Calgary, and Regina, low temperatures and icy field conditions can seriously affect the outcome of a game. Amateur football is governed by Football Canada. At the university level, 26 teams play in four conferences under the auspices of U Sports (known from 2001–2016 as Canadian Interuniversity Sport); the U Sports champion