When you are the best of anything it usually is prestigious. When you are the greatest Steeler that is saying something more. “Mean” Joe Greene has officially retired from the Steelers. He leaves behind the legacy of being the greatest Steeler of all time. Greene is the rock that Chuck Noll built his dynasty on, arguably the greatest defensive lineman in history and he is without question the greatest Steeler player of all time.
http://www.post-gazette.com/stories/sports/steelers/joe-greene-retires-for-final-time-686617/
He has been a part of all Six Super Bowl wins, four as a player and two in his front office position.
I am proud to wear his number on Sundays! 
I tell my kids stories of when he appeared on “The Great Space Coaster” and they created a song about him! http://www.youtube.com/watch?v=uMugnTspS2c
The commercial is a timeless classic and considered one of the greatest Super Bowl Commercials ever; http://www.youtube.com/watch?v=xffOCZYX6F8
To steal a line from the commercial; “I think you’re the best ever.”
Photo from Mean Joe Greene Fan Page on Facebook