Most Improved Since 2009

Horizontal American Style Football in high contrast on black
After comparing the improvement of teams from last year to this year, I was curious which team has improved the most since Pete Carroll and John Schneider came aboard following the 2009 season. The following shows team strength from the end of 2009, compared to this past season. For Seattle, that was the Jim Mora, jr. season.

Only two teams have shown more improvement in that time than the Seahawks. Detroit was far and away the most improved team, going from their dismal 2-14 record with an injured Matthew Stafford to drafting Ndamukong Suh. Oakland just got better by playing someone other than JaMarcus Russell at quarterback. You know the story with Seattle. This feels like a pretty accurate reflection of how much ground the Seahawks have made up league-wide since the regime took office.