2009 Green Bay Packers season - Wikipedia
Matthews vs. Matthews matchup depends on Clay's hamstring - ESPN - Green Bay Packers Blog- ESPN
2012 Vanderbilt Football Fact Book by Vanderbilt Commodores - Issuu
Celebrating Father's Day - The fathers and sons of the NFL
2015 Memphis football Media Guide by University of Memphis Athletic Media Relations - Issuu
The NFC Championship Game will be a family affair for cousins Clay Matthews III and Jake Matthews! Kristen Balboni explains for @TheBuzzer., By NFL on FOX
New Mexico State Football Program by Liberty University - Issuu
2023 NFL Rank: Top 100 player rankings, predictions, stats - ESPN
Cardboard appreciation: 1981 Topps 1980 NL Championships
USC Trojans football - Wikipedia
2023 NFL Rank: Top 100 player rankings, predictions, stats - ESPN
2023 Troy Football Media Guide by Troy University Athletics - Issuu
2023 NFL Rank: Top 100 player rankings, predictions, stats - ESPN
Cleveland Browns, American Football Database
The weird, strange, last-second history between the Atlanta Falcons and Detroit Lions - ESPN - Atlanta Falcons Blog- ESPN