1920 in Canadian football 1920 in Canadian football CIRFU and IRFU adopted a four-yard Interference rule while the CRU opted for three yards of Interference. ARFU played games with 12 players per side and introduced the snap-back. The reduction in the number of players was done for monetary reasons as train rates were high after World War I. The CRU would make the same changes in 1921. The MRFU champion Winnipeg Victorias were unable to field a full team for the WCRFU finals and withdrew from competition. The MRFU wanted to substitute the second place University of Manitoba Varsity team but the SRFU refused
Comparison of Canadian football and rugby union defender. In rugby, rucks and mauls may develop following a tackle when multiple players from each team bind together to move the ball in play (on the ground or in-hand respectively). In Canadian football, equivalents to rucks and mauls are virtually non existent, as play stops when the ball carrier is stopped. This difference can be summed up in the idea that in Canadian football the objective is to bring the player to ground or to disrupt a pass to end the play, whereas in rugby the main objective is to stop the player from breaking the try line. Canadian