An interesting stat to track over Roethlisberger's career; points per possession minute...(These are team offensive stats but Roethlisberger was the QB for the majority of this time.)

2004: 0.685
2005: 0.767
2006: 0.702
2007: 0.735
2008: 0.684
2009: 0.701
2010: 0.724
2011: 0.625
2012: 0.652
2013: 0.590

the 2011 number likely got BA fired. If you go through the effort,a plot will show the gradual decline throughout Roethlisberger's career starting from 2005.