Chapman and Maclain Way’s energetic telling of one of baseball’s great, unheralded stories is as much about independent spirit as it is about the game. When Portland, Oregon, lost its longtime minor-league affiliate, Bing Russell—who briefly played ball professionally before enjoying a successful Hollywood acting career—bought the territory and formed a single-A team to operate outside the confines of major-league baseball. When they took the field in 1973, the Mavericks—the only independent team in America—started with two strikes against them. What did Deputy Clem from Bonanza know about baseball? Or Portland, for that matter? The only thing uniting his players, recruited at open tryouts, was that no other team wanted them. Skeptics agreed that it could never work. But Bing understood a ballplayer’s dreams, and he understood an audience. His quirky, unkempt castoffs won games, and they won fans, shattering minor-league attendance records. Their spirit was contagious, and durin ...