49ers Rookies IMPRESS in Preseason Game 2 vs the Chargers

49ers rookies De'Zhaun Stribling and Kaelon Black look like seasoned vets to begin their NFL careers. Brian Peacock and Eric Crocker break down the preseason contest between the San Francisco 49ers and Los Angeles Chargers. Left guard might be a problem, and did Jacob Cowing win a job with his 83-yard punt return touchdown? Game balls, position battles and MORE. San Francisco 49ers fans are…