Clay Matthews III
A member of the Matthews family of football players , he is the brother of former NFL linebacker Casey Matthews , the son of former NFL linebacker Clay Matthews Jr . , and the nephew of Pro Football Hall of Fame offensive lineman Bruce Matthews . 
<triplet> Casey Matthews <subj> Clay Matthews Jr. <obj> father <triplet> Clay Matthews Jr. <subj> Casey Matthews <obj> child <subj> Bruce Matthews <obj> sibling <triplet> Bruce Matthews <subj> Clay Matthews Jr. <obj> sibling