Every year, Jimmy Kempski of Philly.com generates a list of the average age of every team in the NFL, ranking them from the oldest to the youngest. Two years ago, the Browns were listed as having the 25th oldest offensive line with an average age of 27 years.
Last year, he said the Browns had the 9th oldest offensive line in the NFL, with an average age of 27.2 years of age. However, that was with a projection of Jason Pinkston starting; I correctly substituted Joel Bitonio in as a rookie, yielding a more accurate age of 26.