 Complete the following phrase:  Helped by strong line play, Graham, Motley and Cleveland ends Dante Lavelli and Mac Speedie led a potent offense that dominated the AAFC for three years. The Browns won the AAFC championship in 1947, 1948 and 1949 before the league disbanded and Cleveland was absorbed by the more established NFL. Humble was a consensus second-team All-Pro selection in 1948, when Cleveland won all of its games. Clevelands success continued in the NFL in 1950, when Humble was used on occasion as a linebacker on defense. The Browns finished the season with a 102 record and beat the Los Angeles Rams in the 