The Colts have competed as a member club of the NFL since their founding in Baltimore in 1953 after then-owner Carroll Rosenbloom purchased the assets of the NFL's last founding Ohio League member Dayton Triangles-Dallas Texans franchise. They were one of three NFL teams to join those of the American Football League (AFL) to form the AFC following the 1970 merger. While in Baltimore, the team advanced to the playoffs 10 times and won three NFL Championship games in 1958, 1959, and 1968. The Colts played in two Super Bowl games while they were based in Baltimore, losing to the New York Jets in Super Bowl III and defeating the Dallas Cowboys in Super Bowl V. The Colts relocated to Indianapolis in 1984 and have since appeared in the playoffs 16 times, won two conference championships, and won one Super Bowl, in which they defeated the Chicago Bears in Super Bowl XLI.