WARNING: most of this article blatantly copied from wikipedia
Charles Edward Greene, known as “Mean Joe” Greene, (born September 24, 1946) is a former all-pro American football defensive tackle who played for the Pittsburgh Steelers of the NFL.
Before his NFL career, "Mean Joe" Greene had an outstanding college football career at North Texas State University (now the University of North Texas) (1966–68), leading the team to a 23-5-1 record during his three seasons. In his 29 games at defensive tackle, North Texas State held the opposition to 2,507 yards gained on 1,276 rushes, a per carry average of less than two yards per attempt. His collegiate coach, Rod Rust, said of the 1968 consensus All-America, "There are two factors behind Joe's success. First, he has the ability to make the big defensive play and turn the tempo of a game around. Second, he has the speed to be an excellent pursuit player." A pro scout said, "He's tough and mean and comes to hit people. He has good killer instincts. He's mobile and hostile."He got his nickname when the Pittsburgh fan base mistakenly assumed that the North Texas team nickname of "Mean Green" was Joe Greene's nickname; however, Coach Rust's wife wanted to give a nickname to the team's outstanding defense. Since green is the school's main color, she gave the defense the name "Mean Green".In 1984, he was enshrined in the College Football Hall of Fame. In 2006, Greene was voted to the East-West Shrine Game Hall of Fame.
He is most famous for his 1979 Coca-cola Superbowl commercial, which I cannot embed here due to incompetence.
He is one of three famous people to graduate from UNT, including Dr.Phil, and Anne Rice. Not, that the university would ever let us forget that though.