The Denver Nuggets emerged from the Denver Rockets (who were previously called the Denver Larks), a charter franchise in the American Basketball Association founded in 1967. The Rockets tended to struggle in the postseason early and failed to play in a championship game. They had a solid lineup led by Byron Beck and Larry Jones, then later by Beck and Ralph Simpson. Controversial rookie Spencer Haywood joined the team for the 1969–70 season. Haywood was one of the first players to turn pro before graduating from college, and the NBA initially refused to let him play in the league. Haywood averaged nearly 30 points and 20 rebounds per game in his only ABA season, then breached his Denver contract by signing with the Seattle SuperSonics and jumping to the NBA. (*)