Matthews family - Wikipedia
Clay, Jake Matthews extend reign of NFL's first family third generation - ESPN
Clay Matthews was raised on football and Troy Polamalu hair battle
The Life And Career Of Browns LB Clay Matthews Jr. (Complete Story)
Official Super Bowl 51 Game Program
It's not easy being green: Mike McCarthy's tough, complicated season in Green Bay
Former Clemson standout Dwight Clark set for S.C. Football Hall of Fame
Clay, Jake Matthews extend reign of NFL's first family third generation - ESPN
Clay Matthews Sr., football family patriarch, dies at 88