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
Silesia national football team Silesia national football team Silesia football team () is an informal regional football team made up of players from football clubs located in Silesia, under the auspices of the Silesian Football Association (). It is not affiliated to FIFA, and does not play in official international matches. Although Silesia was never independently affiliated with FIFA, it is a place of origin of many notable football players playing mostly for the Germany, Poland and the Czech Republic national teams. In 2010, the following hypothetical "dream" Silesian team was presented of the current players of the Silesian background: Raphael Schäfer, Marek Jankulovski,