<P> National Football League (1950--present) </P> <Ul> <Li> American Conference (1950--1952) </Li> <Li> Eastern Conference (1953--1969) <Ul> <Li> Century Division (1967--1969) </Li> </Ul> </Li> <Li> American Football Conference (1970--1995; 1999--present) <Ul> <Li> AFC Central (1970--1995; 1999--2001) </Li> <Li> AFC North (2002--present) </Li> </Ul> </Li> </Ul> <Li> American Conference (1950--1952) </Li> <Li> Eastern Conference (1953--1969) <Ul> <Li> Century Division (1967--1969) </Li> </Ul> </Li>

How did the cleveland browns get their name