<P> The world's most valuable sports teams, as ranked annually by the American magazine Forbes, include teams from association football, American football, baseball, and basketball . National Football League franchise Dallas Cowboys, valued at $4.2 billion, was named the world's most valuable sports team of 2017, becoming the first non-association football team to top Forbes' ranking since its inception in 2010 . English club Manchester United (2010--12) and Spanish club Real Madrid (2013--15) have previously each been named the most valuable team three times . </P> <Table> <Tr> <Th> Rank </Th> <Th> Team </Th> <Th> Sport </Th> <Th> Country </Th> <Th> Value ($B) </Th> </Tr> <Tr> <Td> </Td> <Td> Dallas Cowboys </Td> <Td> American Football </Td> <Td> United States </Td> <Td> 4.2 </Td> </Tr> <Tr> <Td> </Td> <Td> New York Yankees </Td> <Td> Baseball </Td> <Td> United States </Td> <Td> 3.7 </Td> </Tr> <Tr> <Td> </Td> <Td> Manchester United </Td> <Td> Soccer </Td> <Td> England </Td> <Td> 3.69 </Td> </Tr> <Tr> <Td> </Td> <Td> Barcelona </Td> <Td> Soccer </Td> <Td> Spain </Td> <Td> 3.64 </Td> </Tr> <Tr> <Td> 5 </Td> <Td> Real Madrid </Td> <Td> Soccer </Td> <Td> Spain </Td> <Td> 3.58 </Td> </Tr> <Tr> <Td> 6 </Td> <Td> New England Patriots </Td> <Td> American Football </Td> <Td> United States </Td> <Td> 3.4 </Td> </Tr> <Tr> <Td> 7 </Td> <Td> New York Knicks </Td> <Td> Basketball </Td> <Td> United States </Td> <Td> 3.3 </Td> </Tr> <Tr> <Td> 8 </Td> <Td> New York Giants </Td> <Td> American Football </Td> <Td> United States </Td> <Td> 3.1 </Td> </Tr> <Tr> <Td> 9 </Td> <Td> Los Angeles Lakers </Td> <Td> Basketball </Td> <Td> United States </Td> <Td> </Td> </Tr> <Tr> <Td> San Francisco 49ers </Td> <Td> American Football </Td> <Td> United States </Td> </Tr> <Tr> <Td> 11 </Td> <Td> Washington Redskins </Td> <Td> American Football </Td> <Td> United States </Td> <Td> 2.95 </Td> </Tr> <Tr> <Td> 12 </Td> <Td> Los Angeles Rams </Td> <Td> American Football </Td> <Td> United States </Td> <Td> 2.9 </Td> </Tr> <Tr> <Td> 13 </Td> <Td> Los Angeles Dodgers </Td> <Td> Baseball </Td> <Td> United States </Td> <Td> 2.75 </Td> </Tr> <Tr> <Td> New York Jets </Td> <Td> American Football </Td> <Td> United States </Td> </Tr> <Tr> <Td> 15 </Td> <Td> Bayern Munich </Td> <Td> Soccer </Td> <Td> Germany </Td> <Td> 2.71 </Td> </Tr> <Tr> <Td> 16 </Td> <Td> Boston Red Sox </Td> <Td> Baseball </Td> <Td> United States </Td> <Td> 2.7 </Td> </Tr> <Tr> <Td> Chicago Bears </Td> <Td> American Football </Td> <Td> United States </Td> </Tr> <Tr> <Td> 18 </Td> <Td> Chicago Cubs </Td> <Td> Baseball </Td> <Td> United States </Td> <Td> 2.68 </Td> </Tr> <Tr> <Td> 19 </Td> <Td> San Francisco Giants </Td> <Td> Baseball </Td> <Td> United States </Td> <Td> 2.65 </Td> </Tr> <Tr> <Td> 20 </Td> <Td> Golden State Warriors </Td> <Td> Basketball </Td> <Td> United States </Td> <Td> 2.6 </Td> </Tr> <Tr> <Td> Houston Texans </Td> <Td> American Football </Td> <Td> United States </Td> </Tr> <Tr> <Td> 22 </Td> <Td> Chicago Bulls </Td> <Td> Basketball </Td> <Td> United States </Td> <Td> 2.5 </Td> </Tr> <Tr> <Td> Philadelphia Eagles </Td> <Td> American Football </Td> <Td> United States </Td> </Tr> <Tr> <Td> 24 </Td> <Td> Denver Broncos </Td> <Td> American Football </Td> <Td> United States </Td> <Td> 2.4 </Td> </Tr> <Tr> <Td> 25 </Td> <Td> Miami Dolphins </Td> <Td> American Football </Td> <Td> United States </Td> <Td> 2.38 </Td> </Tr> <Tr> <Td> 26 </Td> <Td> Green Bay Packers </Td> <Td> American Football </Td> <Td> United States </Td> <Td> 2.35 </Td> </Tr> <Tr> <Td> 27 </Td> <Td> Baltimore Ravens </Td> <Td> American Football </Td> <Td> United States </Td> <Td> 13 </Td> </Tr> <Tr> <Td> 28 </Td> <Td> Pittsburgh Steelers </Td> <Td> American Football </Td> <Td> United States </Td> <Td> 2.25 </Td> </Tr> <Tr> <Td> Seattle Seahawks </Td> <Td> American Football </Td> <Td> United States </Td> </Tr> <Tr> <Td> 30 </Td> <Td> Boston Celtics </Td> <Td> Basketball </Td> <Td> United States </Td> <Td> 2.2 </Td> </Tr> <Tr> <Td> Minnesota Vikings </Td> <Td> American Football </Td> <Td> United States </Td> </Tr> <Tr> <Td> 32 </Td> <Td> Indianapolis Colts </Td> <Td> American Football </Td> <Td> United States </Td> <Td> 2.18 </Td> </Tr> <Tr> <Td> 33 </Td> <Td> Atlanta Falcons </Td> <Td> American Football </Td> <Td> United States </Td> <Td> 2.13 </Td> </Tr> <Tr> <Td> 34 </Td> <Td> Oakland Raiders </Td> <Td> American Football </Td> <Td> United States </Td> <Td> 2.1 </Td> </Tr> <Tr> <Td> 35 </Td> <Td> Manchester City </Td> <Td> Soccer </Td> <Td> England </Td> <Td> 2.083 </Td> </Tr> <Tr> <Td> 36 </Td> <Td> Los Angeles Chargers </Td> <Td> American Football </Td> <Td> United States </Td> <Td> 2.08 </Td> </Tr> <Tr> <Td> 37 </Td> <Td> Carolina Panthers </Td> <Td> American Football </Td> <Td> United States </Td> <Td> 2.075 </Td> </Tr> <Tr> <Td> 38 </Td> <Td> Arizona Cardinals </Td> <Td> American Football </Td> <Td> United States </Td> <Td> 2.025 </Td> </Tr> <Tr> <Td> 39 </Td> <Td> Los Angeles Clippers </Td> <Td> Basketball </Td> <Td> United States </Td> <Td> </Td> </Tr> <Tr> <Td> New York Mets </Td> <Td> Baseball </Td> <Td> United States </Td> </Tr> <Tr> <Td> Tennessee Titans </Td> <Td> American Football </Td> <Td> United States </Td> </Tr> <Tr> <Td> 42 </Td> <Td> Jacksonville Jaguars </Td> <Td> American Football </Td> <Td> United States </Td> <Td> 1.95 </Td> </Tr> <Tr> <Td> 43 </Td> <Td> Arsenal </Td> <Td> Soccer </Td> <Td> England </Td> <Td> 1.93 </Td> </Tr> <Tr> <Td> 44 </Td> <Td> Kansas City Chiefs </Td> <Td> American Football </Td> <Td> United States </Td> <Td> 1.88 </Td> </Tr> <Tr> <Td> 45 </Td> <Td> Cleveland Browns </Td> <Td> American Football </Td> <Td> United States </Td> <Td> 1.85 </Td> </Tr> <Tr> <Td> 46 </Td> <Td> Chelsea </Td> <Td> Soccer </Td> <Td> England </Td> <Td> 1.845 </Td> </Tr> <Tr> <Td> 47 </Td> <Td> Brooklyn Nets </Td> <Td> Basketball </Td> <Td> United States </Td> <Td> 1.8 </Td> </Tr> <Tr> <Td> St. Louis Cardinals </Td> <Td> Baseball </Td> <Td> United States </Td> </Tr> <Tr> <Td> Tampa Bay Buccaneers </Td> <Td> American Football </Td> <Td> United States </Td> </Tr> <Tr> <Td> 50 </Td> <Td> Los Angeles Angels of Anaheim </Td> <Td> Baseball </Td> <Td> United States </Td> <Td> 1.75 </Td> </Tr> <Tr> <Td> New Orleans Saints </Td> <Td> American Football </Td> <Td> United States </Td> </Tr> </Table>

Which us professional sports franchise has the highest value