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Running back Jerome Bettis was drafted by the Los Angeles Rams, but was eventually traded to the Steelers, where he made a name for himself and helped lead Pittsburgh to a Super Bowl victory. Bettis was traded to the Steelers before the 1996 and played there until he walked away from the game in 2005. When he did retire, he was, and still is, the sixth-leading rusher in NFL history. He's a six-time Pro Bowler and a three-time All Pro. His jersey, No. 36, is retired in Pittsburgh.
Greene played for the Steelers from 1993 through the 1995 season as a linebacker and defensive end. In '93, he finished the season with 12.5 sacks and was an All-Pro choice in '94. In '95, he was voted into his third Pro Bowl and played for the Steelers in Super Bowl XXX against the Dallas Cowboys, a game which they lost.
Robinson doesn't have ties with the Steelers, but he did play college football at Penn State. He was drafted in 1963 in the third round by the AFL's San Diego Chargers. While at Penn State he was named as an All-American, was College Player of the Year from the Newark Athletic Club in 1962 and was College Lineman of the Year, voted on by the Philadelphia Sports Writers Association. He was also voted into the College Football Hall of Fame in 1997.