Key statistic shows Roethlisberger is one of the most prolific passers in NFL history

John Clayton of ESPN.com released his final QB rankings yesterday and Pittsburgh Steelers quarterback came in at No. 4 on Clayton's list, behind Tom Brady, Peyton Manning and Drew Brees.

"Roethlisberger grew up as a person after starting the season with a four-game suspension and remained every bit as good as a quarterback. The only knock is his tendency to have low-scoring games against top defenses, " Clayton said on Roethlisberger.

Seeing Roethlisberger at No. 4 on Clayton's list is somewhat of a surprise as Roethlisberger's often overlooked by the so-called NFL experts and even has been for years by Clayton who even as late as the 2008 season was on radio in Pittsburgh still calling Carson Palmer a better quarterback than Roethlisberger.

Roethlisberger is often overlooked because the focus is always on meaningless volume statistics but a key career statistic shows that Roethlisberger is one of the most prolific passers in NFL history and holds a significant edge on Manning and even Brady in this category.