That rarest of things: a film about a racehorse that’ll run and run. In the mid-’30s, Seabiscuit was an unlikely loser turned winner, trained by a too-tall jockey (Tobey Maguire), a distressed millionaire (Jeff Bridges) and a jaded cowboy (Chris Cooper). Gary (Pleasantville) Ross, who also wrote, directs the three actors (and the horses) without excessive mushiness.