The Baltimore Colts and the NFL team that played in Baltimore between 1953-1983 are unrelated .
Three of its teams were admitted to the NFL : San Francisco 49ers , Cleveland Browns and Baltimore Colts ( not related to the later NFL team that would play in Baltimore from 1953 through 1983 , now the Indianapolis Colts ) .The AAFC was the second American professional sports league ( the first being the third American Football League ) to have its teams play in a double round robin format in the regular season : each team had a home game and an away game with each of its AAFC `` brethren . ''
All-America Football Conference