Longtime Steelers standout linebacker James Harrison, who'll turn 40 on May 4, announced his retirement via social media early Monday.
"I've missed way too much for way too long ... and I'm done," Harrison wrote in part on Instagram with a montage of photos of his kids and a telling hashtag: #2ndAndFinalRetirement.
He previously announced his retirement four years ago, only to return.
An undrafted free agent out of college, Harrison signed with the Steelers in 2002 and began to make in impact in 2004, eventually ending up playing 14 of his 15 NFL seasons with Pittsburgh, twice earning first-team All-Pro honors and being named to the Pro Bowl five times in consecutive seasons from 2007-11.
He also was the 2008 AP Defensive Player of the Year in helping lead the Steelers to a Super Bowl victory. He was a part of the Steelers' Super Bowl winning team following the 2005 season, as well.
He finishes his career with 84 1/2 sacks, 34 forced fumbles and eight interceptions to go along with 573 tackles and 222 assists.
Harrison played one season, 2013, with the Bengals and one game in 2017 with the Patriots after being released by Pittsburgh in late December.