The Offensive Line

Penning and Hurst not getting just plain whooped every other play and Penning not getting called for holding 3-4 times a game is the big difference.

The other improvements likely come from things like more and creative run plays with all our backs, Carr making quicker and better decisions, improved play calling. All thongs you'd expect from a team with the talent thats finally beginning to click.
Should have another opportunity to show improvement next week vs the bears and again the following week vs the Vikings.