Youthful supporting cast has changed vibe, but driving forces of 49ers’ camp have been George Kittle, Fred Warner

Youthful supporting cast has changed vibe, but driving forces of 49ers’ camp have been George Kittle, Fred Warner

SANTA CLARA — The training camp portion of the 49ers’ preseason is winding down. The 49ers will actually have a game plan of sorts in place Saturday when they host the Los Angeles Chargers at Levi’s Stadium in their final exhibition game. It’s a jigsaw puzzle, with lots of injuries that have caused missed days but nothing serious in terms of losing core players for weeks at a time. Despite the mix and match nature of practice, the 49ers have com…