Harrison spent a season with the Cincinnati Bengals in 2013, but returned to Pittsburgh the following season and ultimately ended his career in New England after being released by the Steelers last season.
Harrison, who turns 40 on May 4, posted photographs of his children with the caption: "I've missed way too much for way too long... and I'm done". Many thanks to my family, coaches, the fans, and everyone...
The star NFL linebacker announced this morning that he's made a decision to retire from the league. He played quite a bit for New England after making his debut in the regular season finale, totaling six tackles and a QB hit in three playoff games.More news: U.S. bans American companies from selling to Chinese phone maker ZTE
More news: Australia-Shark Attack, AS
More news: Firing from Afghanistan: Two FC men martyred in Kurram Agency
Harrison is a five-time Pro Bowler, a two-time member of the All-Pro team, and the NFL's 2008 Defensive Player of the Year, but he is also well known for his efforts to keep his body in top form, including his intense, often unorthodox workout routines.
Known for delivering hard hits, Harrison began his National Football League career with Pittsburgh in 2002 and helped the Steelers capture the Super Bowl in 2006 and again in 2009. He finishes his career as the Steelers' all-time leader in sacks with 80.5.
Pittsburgh signed the Kent State product in 2002 as an undrafted rookie free agent.