Whether you still look at Harrison as a bigger villain than Le'Veon Bell, you have to acknowledge his time in Pittsburgh.
"I've missed way too much for way too long.and I'm done", the caption said.
Harrison finishes his career with 84.5 sacks, 34 forced fumbles and eight interceptions to go along with 795 total tackles. He signed with the New England Patriots in late December after getting released by the Pittsburgh Steelers.
With his career now over, Harrison can begin polishing up the speech he'll deliver in Canton, Ohio. He remained productive into his late 30s, registering at least five sacks from 2014-16. He spent time on the Steelers' practice squad and was signed to the active roster during the 2002 season, playing special teams.
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That marked the second Lombardi Trophy of Harrison's career, having also triumphed with the Steelers three years previous against the Seattle Seahawks in Super Bowl XL.
This is the second time Harrison has called it quits. Harrison lashed out at commissioner Roger Goodell, calling him "a crook" in a 2011 magazine article. He announced in August he was done, but Harrison returned to the field in September.
At a position where few last into their mid-30s, Harrison continued to thrive.
Harrison signed a two-year deal last spring that would have kept him in Pittsburgh through his 40th birthday.