Strong Safety Bob Sanders #31 of the San Diego Chargers looks on against the San Francisco 49ers during their preseason.
The San Diego Chargers have placed Bob Sanders on injured reserve with a knee injury, ending the season for the oft-injured strong safety.
Sanders played in only two games with the Chargers before getting hurt. Coming into the season, he missed the equivalent of four full seasons due to injuries.
The Chargers signed Tommie Harris to add depth to their banged-up defensive line.
Copyright NBC San Diego / Associated Press