Sport is big business in the United States. The National Football League is the most lucrative sports league in the world, with an average team value of $1.17 billion. Out of all teams in the league, the Dallas Cowboys are the wealthiest – Forbes values the Texas outfit at a whopping $2.3 billion.Major League Baseball comes second with an average team value of $744 million. The New York Yankees are level with the Dallas Cowboys in the value stakes with $2.3 billion. The National Basketball Association rounds off the top three. The New York Knicks are the NBA’s most valuable team with $1.1 billion while the average team value across the league stands at $509 million.These figures are some distance ahead of Major League Soccer where the average team value is just $37 million. The Seattle Sounders are the wealthiest outfit in the MLS, valued at $175 million.