Left tackle Jonas Jennings will be out of the 49ers' lineup indefinitely while dealing with a "private matter," coach Mike Nolan said Thursday. The oft-injured Jennings is healthy, but Nolan wouldn't disclose the reason for the seventh-year pro's absence, which could extend through the 49ers' bye next week -- though Nolan said Jennings will return to the team this season. "As always, our most important interest is in the well-being of our players," Nolan said.