Pittsburgh Steelers (Earth-1: Pre-Crisis)

"Ok. What else did you miss? Super Bowl winners… Giants, Steelers, Saints, Packers, Giants again. A black president, that's new. Oh, and “Lost”, they were all dead… I think."

- Tommy Merlyn to Oliver Queen

The Pittsburgh Steelers were an American football team who won the Super Bowl on one occasion.

Super Bowl
At some point, the Pittsburgh Steelers were formed as an American football team. They won the Super Bowl in 2009.