Green Line Rivalry - Wikipedia
https://en.wikipedia.org/wiki/Green_Line_RivalryIce hockey History. The series dates to February 6, 1918, when BU first began playing hockey, and played its lone game that year against BC, a 3–1 loss at the Boston Arena. Since then, no other opponent has appeared on either teams' schedule more often. The rivalry has been renewed annually since the 1946–47 season, and the two teams have met at least twice a year since 1949.