The Yankees are the all-time most successful team with 26 world series championships.
The Yankees.
The most successful profession team is the Brazalian team.
The Arkansas Razorbacks from the University of Arkansas are the most successful Arkansas football team. Arkansas does not have a National Football team, therefore the most successful team would be a college team.
Boston Celtics are the most successful NBA Team with 17 Championships, as of 2009.
Brazil
CLIPPERS
The two most successful sports franchise world wide are the New York Yankees of American Major League Baseball, and the Manchester United soccer club in England. Edit: Manchester United aren't even the most successful English team, that is Liverpool FC. In Europe, Real Madrid are considered the most successful with FIFA voting them the most successful club of the 20th century.
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Liverpool FC
scotland
Brazil or Mexico
The most successful club is Liverpool.