How can I put this delicately???
Davis does not have the greatest awareness in the league, he is easily confused or he makes slow decisions when it comes to anything other than blocking the guy in front of him.
When you play teams that like to twist and stunt, like the Chargers and Ravens do, you have to be aware of passing guys off and picking up different guys very quickly. If all of your o-line is on the same page and the guard passes his go off to the tackle and vice versa, you can block it up and get some big gainers.
However, if just 1 of your lineman gets confused.......well it usually ends very badly with either a sack or pick. Go watch the Ravens sometime and you will see what I mean, they use stunts and twist more than anybody.