In 1906, citing concerns about the violence in American Football, universities on the West Coast, led by California and Stanford, replaced the sport with rugby union. At the time, the future of American football was very much in doubt and these schools believed that rugby union would eventually be adopted nationwide. Other schools followed suit and also made the switch included Nevada, St. Mary's, Santa Clara, and USC (in 1911). However, due to the perception that West Coast football was inferior to the game played on the East Coast anyway, East Coast and Midwest teams shrugged off the loss of the teams and continued playing American football. With no nationwide movement, the available pool of rugby teams to play remained small. The schools scheduled games against local club teams and reached out to rugby union powers in Australia, New Zealand, and especially, due to its proximity, Canada. The annual Big Game between Stanford and California continued as rugby, with the winner invited by the British Columbia Rugby Union to a tournament in Vancouver over the Christmas holidays, with the winner of that tournament receiving the Cooper Keith Trophy.