What are the greatest sports teams ever?

Can you even compare a team in the NBA or MLB to Australian rugby or women’s soccer? At the center of that conversation is where Sam Walker, founding editor of The Wall Street Journal’s sports section, found himself as he set out to write Captain Class, his new book about the 16 of the alltime best sports teams—and what exactly they have in common. Walker’s fascination with the topic started when he was 11 years old, when his little-league baseball team suddenly went undefeated one summer, but he ultimately decided to dive into the debate after the Boston Red Sox won the World Series in October 2004.

Source: Yahoo.com