Although best known as the deputy on Bonanza (1959) and Robert in The Magnificent Seven (1960), Russell's was also well known on a national level as the owner of the Portland Mavericks Baseball Club. Helming the only independent team in the class A Northwest League, Russell was an innovator. Before Bull Durham (1988), there were the Mavericks. Russell kept a 30 man roster because he believed that some of the players deserved to have one last season. His motto was simply one three lettered word - not WIN - although the Mavericks did just that -…