Terry Bradshaw completed a 90 yard pass to Mark Malone in 1981.
Mark Malone caught the longest touchdown pass in Steelers history which covered 90 yards. It was thrown by Terry Bradshaw against the Seattle Seahawks on November 8, 1981.
The longest pass completion in Steelers history is 95 yards. Ben Roethlisberger to Mike Wallace on October 23, 2011.
Santonio Holmes caught the eventual game winning pass from Ben Roethlisberger.
Through the 2010 season, that is Franco Harris with 100 (91 rushing, 9 pass receiving).
The franchise now known as the Pittsburgh Steelers entered the NFL in 1933 as the Pittsburgh Pirates. On Wednesday, September 7th, 1933, Marvin "Butch" Kottler became the first Pittsburgh player to score a touchdown when he intercepted a pass at Pittsburgh's 1 yard line and returned it 99 yards for a touchdown against the Chicago Cardinals (who later moved to St. Louis, and then Arizona). The Pittsburgh Pirates went on to win that game, the second one in their history, 14-13. Kottler's 99-yard return remained the team record for the longest interception return until Super Bowl XLIII (43) on February 1, 2009, when the Steelers' James Harrison returned an interceptions for 100 yards just before halftime, against the Arizona Cardinals.
Willie Parker of the Pittsburgh Steelers in Super Bowl XL vs. Seattle.His 75-yard touchdown run is the longest run from line of scrimmage in Super Bowl history, surpassing Marcus Allen's 74-yard run in Super Bowl XVII.Willie Parker's TD was a run. The longest touchdown passwas to wide receiver Mussin Mohammed from QB Jake Delhomme of the Carolina Panthers for 85 yards in 2004.
If you're referring to the game-winning catch at the end of the game it is Santonio Holmes. He caught the pass and managed to get both feet down in bounds to seal the victory for the Steelers.
Mike Wallace - 95 yards (October 23, 2011)
The Pittsburgh Steelers. No question about it!
He is a defensive linebacker for the Pittsburgh Steelers. He holds the record for the longest play in Super Bowl history. In Super Bowl XLIII, he intercepted a pass by Kurt Warner (of the Arizona Cardinals) and returned it 100 yards for a touchdown to extend the Steelers 14-7 lead to 16-7 (Jeff Reed extra point made the score 17-7) just before halftime.
99 yards to Mac Speedie on November 11, 1947. The Browns were playing in the AAFC at the time. His longest NFL TD pass was 81 yards to Dub Jones on September 30, 1951.
It was tight end Jackie Smith in Super Bowl XIII, the Cowboys' second of three Super Bowl clashes with the Pittsburgh Steelers.