(born May 4, 1978) is a former American football linebacker.
He played college football for Kent State University and was signed by the Pittsburgh Steelers as an undrafted free agent in 2002.
A five-time Pro Bowl selection, Harrison won two Super Bowls with the Steelers: XL and XLIII.
In 2008, he became the only undrafted player to be named Associated Press NFL Defensive Player of the Year.
Harrison also played for NFL Europe's Rhein Fire and had brief stints with the Baltimore Ravens and Cincinnati Bengals.
After the 2013 season, he stated that he would be retiring from the NFL, but he came out of retirement to return to the Steelers, and spent his final NFL season with the New England Patriots.
Harrison is the Steelers' all-time sack leader, with 80.5.
Harrison currently appears on FS1 as a football analyst.