Clay Matthews can't believe the Packers already gave away his No. 52
Madden NFL 12 (Game) - Giant Bomb
Browns: Clay Matthews Jr. and others to wear 57 in Cleveland
Cleveland Browns, American Football Wiki
Browns to induct LB Clay Matthews into Ring of Honor
Browns: Clay Matthews Jr. and others to wear 57 in Cleveland
Former Cleveland Browns linebacker Clay Matthews has one son in the Super Bowl and another in the Senior Bowl
Perspective Of An Average Steelers Fan: NFL Officiating Is A Clear Problem - Steelers Depot
Packers defense has more pieces to its puzzle
Green Bay Packers All-Franchise Team - Last Word on Pro Football
Hall of Fame finalists compared to Browns' Clay Matthews, Joe Thomas