He was promoted to the active roster on December 15, after center Eugene Amano was placed on the injured reserve list due to a neck injury and started the last game of the season against the Indianapolis Colts.
Kevin's father, Bruce Matthews, is a Hall of Fame offensive lineman who played for the Houston / Tennessee Oilers / Titans from 1983–2001.
Kevin's uncle, Clay Matthews, Jr., is a former four-time Pro Bowl linebacker who played for the Cleveland Browns and Atlanta Falcons from 1978–1996.
Kevin's grandfather, Clay Matthews, Sr., is a former offensive tackle and linebacker who played for the San Francisco 49ers for four seasons during the 1950s.
Kevin also has a younger brother Mike, who is a center that was signed as an undrafted free agent by the Cleveland Browns.