PITTSBURGH >> If Hyun-Jin Ryu keeps winning immunity challenges, he might not have to leave the island after all.While other Dodgers starters pass the time on the DL or search for their mechanics, Ryu has become the Dodgers' most consistent starter. He held the Pittsburgh Pirates to one run on four hits in six innings of a 5-2 victory Thursday, the eighth time in his past nine starts Ryu has allowed two runs or less.