Packers' Matthews has football in his blood
For Packers' Matthews, the passion is all in the family
Commentary: Trio of former Browns should be recognized in Hall of Fame
Cleveland Browns: Former linebacker one of the best NFL fathers
Clay Matthews III - Wikipedia
Clay Matthews happy to get Week 3 win – and for his dad, too
For Matthews Clan, N.F.L. Is All in the Family - The New York Times
Clay Matthews was one of the best linebackers to ever play the
Former Packers, Rams OLB Clay Matthews announces 'playing days are
Packers Clay Matthews Unofficially Retires - Gridiron Heroics
Clay Matthews comes up big for Rams defense on family's emotional
Former Cleveland Browns linebacker Clay Matthews has one son in