In 1970, the AFL–NFL merger was completed after four years and the Raiders joined the Western Division of the American Football Conference (actually the AFL West with the same teams as in 1969, except for the Cincinnati Bengals) in the newly merged NFL. The first post-merger season saw the Raiders win the AFC West with an 8–4–2 record and advance to the conference championship, where they lost to the Baltimore Colts. Despite another 8–4–2 season in 1971, it was only good for second place in the AFC West, and the team failed to make the playoffs. When backup offensive lineman Ron Mix played, the 1971 Raiders had an eventual all-Pro Football Hall of Fame offensive line with tackle Art Shell, guard Gene Upshaw, center Jim Otto, and tackle Bob Brown.