Informally known as the "Willy" loop,[1][2] The Western International League operated in 1922, 1937 to 1942, and 1946 to 1954.[3][4] In 1955, the league changed its name to become the Northwest League,[5] and operated through 2019 as a Class A-Short Season loop under that name. In the minor league reorganization of 2021, most Northwest League teams became members of the High-A West circuit, before resuming the former name in 2022
Johnson, Lloyd; Wolff, Miles, eds. (1997). The Encyclopedia of Minor League Baseball (2nd ed.). Durham, North Carolina: Baseball America. ISBN978-0-9637189-8-3.
^"Willy loop race tighter". Ellensburg Daily Record. (Washington). Associated Press. July 17, 1953. p. 6. Archived from the original on January 2, 2021. Retrieved October 3, 2016.
^Missildine, Harry (April 20, 1972). "Northwest League goes back to 1890". Spokesman-Review. Spokane, Washington. p. 22. Archived from the original on January 2, 2021. Retrieved October 9, 2016.
^"Vancouver takes WIL crown, 12-2". Spokesman-Review. Spokane, Washington. September 13, 1954. p. 11. Archived from the original on January 2, 2021. Retrieved November 12, 2015.