Tag Size: Medium

Chest - armpit to armpit, lying flat - 19 3/4"

Length - top of shoulder, at neckline to bottom of shirt - 26 3/4"

William Clay Matthews III (born May 14, 1986) is an American football outside linebacker for the Los Angeles Rams 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. At USC, Matthews was a standout special-teams player, winning three consecutive Special Teams Player of the Year awards from 2006 to 2008. He also played reserve outside linebacker during those years before moving into a starting role his senior season. During his college career, he was a part of three Pac-10 Championship teams.

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. 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. Matthews continued his role as a leading pass rusher, recording at least six sacks in the first nine seasons he played. He also has showed his athleticism and abilities by playing both inside and outside linebacker during the 2014 and 2015 seasons.  A member of the Matthews family of football players, he is the son of former NFL linebacker Clay Matthews Jr. and nephew of Pro Football Hall of Fame offensive lineman Bruce Matthews.

The Green Bay Packers are a professional American football team based in Green Bay, Wisconsin. The Packers compete in the National Football League (NFL) as a member club of the league's National Football Conference (NFC) North division. It is the third-oldest franchise in the NFL, dating back to 1919, and is the only non-profit, community-owned major league professional sports team based in the United States. Home games have been played at Lambeau Field since 1957.

The Packers are the last of the "small town teams" which were common in the NFL during the 1920s and 30s. Founded in 1919 by Earl "Curly" Lambeau and George Whitney Calhoun, the franchise traces its lineage to other semi-professional teams in Green Bay dating back to 1896. Between 1919 and 1920, the Packers competed against other semi-pro clubs from around Wisconsin and the Midwest, before joining the American Professional Football Association (APFA), the forerunner of today's NFL, in 1921. Although Green Bay is by far the smallest major league professional sports market in North America, its local fan and media base extends 120 miles south into Milwaukee, where it played selected home games between 1933 and 1994. And despite its small market, Forbes ranked the Packers as the world's 26th most valuable sports franchise in 2016, with a value of $2.35 billion.

The Packers have won 13 league championships, the most in NFL history, with nine pre-Super Bowl NFL titles in addition to four Super Bowl victories. The Packers won the first two Super Bowls in 1967 and 1968 and were the only NFL team to defeat the American Football League (AFL) prior to the AFL–NFL merger. The Vince Lombardi Trophy is named after the Packers' coach Lombardi, who guided them to their first two Super Bowls. Their two additional Super Bowl wins came in 1997 and 2011.

The Packers are long-standing adversaries of the Chicago Bears, Minnesota Vikings, and Detroit Lions, who today comprise the NFL's NFC North division, and were formerly members of the NFC Central Division. They have played over 100 games against each of those teams through history, and have a winning overall record against all of them (only the Kansas City Chiefs and Dallas Cowboys have that distinction with their division rivals). The Bears–Packers rivalry is one of the oldest in NFL history, dating back to 1921.