The Rockets traded Agase and fellow lineman Chubby Grigg the following year to the Cleveland Browns, who had won the AAFC championship in each of the league's first two years of play. Led by quarterback Otto Graham, fullback Marion Motley and ends Dante Lavelli and Mac Speedie, Cleveland won the championship again in 1948, posting a perfect 14–0 record and beating the Buffalo Bills in the title game. Another championship followed in 1949, but the AAFC then dissolved and the Browns, along with two other teams, were absorbed by the NFL. Helped by a strong offensive line including Agase, center Frank Gatski and tackles Lou Groza and Lou Rymkus, Cleveland won the NFL championship in 1950. The team reached the NFL championship in 1951 but lost to the Los Angeles Rams. Cleveland lost 24–17 despite gaining more yards and more first downs than the Rams. "It was a very disappointing loss", Agase later said. "We weren't quite as sharp as we normally were on offense."