History and League Success
The Seahawks joined the NFL in 1976 as an expansion team, along with the Tampa Bay Buccaneers. In order for each team to play every other (then existing) NFL team over their first two seasons, the Seahawks were placed in the NFC West for the first season; the following season the teams were placed in their (then) permanent conferences and divisions, with the Seahawks moving into the American Football Conference (AFC) West Division.
With the addition of the Houston Texans as the 32nd franchise, the NFL decided to realign into the two conferences (NFC and AFC), with four divisions in each conference (North, East, West, and South), and four teams in each division. Houston was moved into the AFC South, while Seattle was moved (back) to the NFC West.
The Seahawks have won one Super Bowl (XLVIII). Interestingly, in their first playoff season they made it to the AFC Championship game, thus making them the only NFL franchise to have played in both the AFC and NFC Championship Games.
NFC West Rivals