No. The Steelers were not a wildcard team. They won their division outright.
The wildcard was established in 1994, but the season was shortened by a strike so the first team to win a wildcard was the Yankees in 1995. Three teams have won the World Series as a wildcard, the Red Sox in 2004, Angels in 2002 and the Marlins in 1997 and 2003.
1993 San Francisco Giants won 102 games but were 1 game back and there was no wildcard.
The Raiders won Super Bowl XV.
2008 new york giants made it to the superbowl, and infact won the superbowl they were a wildcard team
The NBA does uses a seeding format. There are technically no wildcard teams involved.
20 games by the a's
New York Yankees with 24
Most World Series won: New York Yankees - 27.