Minor league baseball teams were based in Centralia, Washington in four seasons between 1903 and 1912. Centralia teams played as members of the Class D level Southwest Washington League in 1903 and 1904 and the Washington State League in 1911 and 1912, winning the 1911 league championship. Centralia teams hosted home minor league games at Riverside Park.

The South Bend River Rats were a minor league baseball team based in South Bend, Washington. In 1911, the South Bend River Rats played as members of the Class D level Washington State League in their only season of play, finishing last in the four-team league standings.