Legendary NFL Families: Players Whose Kids Also Play
The Matthews Football Family Tree : r/nfl
Happy Birthday to LB Clay Matthews
For Matthews Clan, N.F.L. Is All in the Family - The New York Times
Clay Matthews Football Gallery
Matthews enters Browns' Ring of Honor
Why Clay Matthews Jr. Deserves to be Among the Best of the Best at
Toughness spans Matthews family's NFL legacy
Clay Matthews III - Wikipedia