While I don't subscribe to Pro Football Focus, I do appreciate their insights. Maybe it's confirmation bias. Anyway, here's a link to their breakdown of Week 5.
What I got from this is something that I think everyone has seen. The offensive tackles are abysmal, and Kolb is not doing much. Go back into the archives to see that this has been a consistent issue.
What is nice though, is that AJ Jefferson had a solid game and is turning into a good player. This bodes well for the future if Peterson can improve and Toler coming back next year.