Ivy League Eastern Intercollegiate Baseball League; they were later joined by Harvard, Brown, Army and Navy. Before the formal establishment of the Ivy League, there was an "unwritten and unspoken agreement among certain Eastern colleges on athletic relations". The earliest reference to the "Ivy colleges" came in 1933, when Stanley Woodward of the New York Herald Tribune used it to refer to the eight current members plus Army. In 1935, the Associated Press reported on an example of collaboration between the schools: Despite such collaboration, the universities did not seem to consider the formation of the league as imminent. Romeyn Berry, Cornell's
Ivy League in 1937. Yale and Columbia previously fielded teams in the league but no longer do so. The Ivy League is home to some of the oldest college rugby teams in the United States. Although these teams are not "varsity" sports, they compete annually in the Ivy Rugby Conference. The table above includes the number of team championships won from the beginning of official Ivy League competition (1956–57 academic year) through 2016-17. Princeton and Harvard have on occasion won ten or more Ivy League titles in a year, an achievement accomplished 10 times by Harvard and 24 times by Princeton, including