The Portland Mavericks were an independent professional baseball team in the northwestern United States, based in Portland, Oregon. They began play in the short-season Class A Northwest League in 1973, after the Portland Beavers of the Pacific Coast League left after the 1972 season and became the Spokane Indians. The Mavericks operated as an independent club in Portland for five seasons, until the return of the PCL in 1978, and played home games on artificial turf at Civic Stadium in Portland. The Mavericks were owned by ex-minor league player and television actor Bing Russell, and were initially the league's only independent club. As owner, Russell kept all corporate sponsorship outside the gates, and hired professional baseball's first female general manager, as well as the first Asian American general manager.

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