Even though he was the son of an All-Pro NFL linebacker, he entered USC as an unheralded, walk-on student athlete.
Matthews was considered a top prospect for the 2009 NFL Draft.
He was ultimately selected by the Packers in the first round of the Draft (26th overall) after the team traded up to make the selection.
Matthews continued his role as a leading pass rusher, recording at least 6 sacks in every season he has played.
He also has showed his athleticism and abilities by playing both inside and outside linebacker during the 20 seasons.
The Packers used the first-round pick obtained from the Patriots to acquire Matthews with the 26th overall selection in the 2009 NFL Draft.
Kevin Greene, the former All-Pro linebacker who is third on the all-time sack list with 160 (most ever by a linebacker), was hired by Dom Capers in 2009 to coach the outside linebacker position.William Clay Matthews III (born May 14, 1986) is an American football outside linebacker for the Green Bay Packers of the National Football League (NFL).After attending Agoura High School in Agoura Hills, California, Matthews was a walk-on student athlete at the University of Southern California for the USC Trojans football team under head coach Pete Carroll.In his rookie year, Matthews recorded 10 sacks while playing outside linebacker.He topped that total in 2010 with 13.5 sacks, helping the Packers to their Super Bowl XLV victory against the Pittsburgh Steelers.He remained a non-athletic scholarship (a "walk on"), reserve linebacker during the 2005 season, and played mainly on special teams.