The Seattle Rainiers, originally named the Seattle Indians and also known as the Seattle Angels and, during 1919, the Seattle Purple Sox, were a Minor League Baseball team in Seattle, Washington, that played in the Pacific Coast League from 1903 to 1906 and 1919 to 1968. They were initially named for the indigenous Native American population of the Pacific Northwest, and changed their name after being acquired by the Rainier Brewing Company, which was in turn named for nearby Mount Rainier.

The Oakland Oaks were a minor league baseball team in Oakland, California that played in the Pacific Coast League from 1903 through 1955, after which the club transferred to Vancouver, British Columbia. The team was named for the city and used the oak tree and the acorn as its symbols.