Chargers offensive line vulnerable

San Diego Chargers quarterback Philip Rivers has been sacked a mere five times this season, tied for fifth-least among QBs. This comes as a significant improvement over 2012 when Rivers was sacked 49 times, second-most league-wide. In Week 4, the Chargers take on the Dallas Cowboys, who have tallied 13 sacks on the season and are fourth in the NFL with a 10.2 percent sack rate. An important note for the Cowboys pass rush is that the Chargers may be without key personnel on the offensive line due to injury.