Beginning in 1890s, American football was becoming an increasingly violent sport. In 1905, there were 18 deaths reported as being caused by the play on the field. The next year, numerous rule changes were agreed upon by the majority of American schools. Berkeley, Stanford, along with other West Coast institutions decided to go in another direction, switching their primary sport to rugby, a sport they considered to be less dangerous. During these years, California wielded dominant teams, however the Bears were able to beat Stanford only three times. In 1915, due to various causes, including students frustration with those results, the university along with other west coast teams decided to return to American football.