Tampa Bay Buccaneers, joined the NFL in 1976 as expansion teams. The Seahawks are the only NFL team to switch conferences twice in the post-merger era. The franchise began play in 1976 in the NFC West division but switched conferences with the Buccaneers after one season and joined the AFC West. This realignment was dictated by the league as part of the 1976 expansion plan, so that both expansion teams could play each other twice and every other NFL franchise once during their first two seasons. In 2002, the Seahawks were returned to the NFC West as part of an NFL realignment plan that gave each conference four balanced divisions of four teams each. As a result, the Seahawks are the only team to play in both the AFC and NFC Championship Games. The Seahawks have one Super Bowl appearance, losing 21-10 to the Pittsburgh Steelers in Super Bowl XL.