Giants closer Brian Wilson isn't expected to be ready to pitch by Opening Day. San Francisco manager Bruce Bochy said Monday that Wilson's chances of playing when the regular season begins are "less than 50-50." A final decision won't be made until after Wilson throws a light bullpen session in Arizona on Tuesday. "I'll be honest. I think he's less than 50-50," Bochy said. "But we're not going to rule him out completely." Wilson strained a muscle on his left side on March 17 and also missed time early in spring training with back tightness.