Colin Kaepernick went down once, then again and another time. Pressured from every direction by San Diego's defense, the quarterback had limited good looks before turning the game over to backup Blaine Gabbert. The 49ers' offense still looks shaky two weeks from the regular season, and it did just enough for the team's first preseason victory in a 21-7 win against the Chargers on Sunday. The offensive line showed vulnerabilities all day. Read more http://scores.espn.go.com/nfl/recap?gameId=400551879
