upsets in American sports history. With the win, the AFL finally achieved parity with the NFL and legitimized the merger of the two leagues. That notion was reinforced one year later in Super Bowl IV, when the AFL champion Kansas City Chiefs upset the NFL champion Minnesota Vikings, 23–7, in the last championship game to be played between the two leagues. The Vikings, favored by 12½ points, were held to just 67 rushing yards. The last game in AFL history was the AFL All-Star Game, held in Houston's Astrodome on January 17, 1970. The Western All-Stars, led by Chargers quarterback John Hadl, defeated the Eastern All-Stars, 26–3. Buffalo rookie running back O. J. Simpson carried the ball for the last play in AFL history. Hadl was named the game's Most Valuable Player. Prior to the start of the 1970 NFL season, the merged league was organized into two conferences of three divisions each. All ten AFL teams made up the bulk of the new American Football Conference. To avoid having an inequitable number of teams in each conference, the leagues voted to move three NFL teams to the AFC. Motivated by the prospect of an intrastate rivalry with the Bengals as well as by personal animosity toward Paul Brown, Cleveland Browns owner Art Modell quickly offered to include his team in the AFC. He helped persuade the Pittsburgh Steelers (the Browns' archrivals) and Baltimore Colts (who shared the Baltimore-Washington market with the Washington Redskins) to follow suit, and each team received US$3 million to make the switch. The remaining 13 NFL teams became part of the National Football Conference. Pro Football Hall of Fame receiver Charlie Joiner, who started his career with the Houston Oilers (1969), was the last AFL player active in professional football, retiring after the 1986 season, when he played for the San Diego Chargers. Legacy Overview The American Football League stands as the only professional football league to successfully compete against the NFL. When the two leagues merged in 1970, all ten AFL franchises and their statistics became part of the new NFL. Every other professional league that had competed against the NFL before the AFL–NFL merger had folded completely: the three previous leagues named "American Football League" and the All-America Football Conference. From an earlier AFL (1936–1937), only the Cleveland Rams (now the Los Angeles Rams) joined the NFL and are currently operating, as are