Cowboys, Yankees headline Forbes' 50 Most Valuable Sports Teams Unknown 17:48 The Cowboys have had the title for the past four years and are valued at $5 billion. Share this Share on FacebookTweet on TwitterPlus on Google+ Related PostsJuventus vs Lazio: Cristiano Ronaldo Brace Puts Juve on Brink of Another Serie A TitleA Year to Go But Rearranged Tokyo Olympics Games Still Shrouded in UncertaintyBrewers' Woodruff on season with no swings: 'I hope it doesn’t continue'Can Dominik Dijakovic stop Karrion Kross this Wednesday on NXT?Not Much Respect for Arsenal Off the Pitch: Manchester City Manager Pep GuardiolaOrlando City wins Group A with 1-1 draw vs. Philadelphia Union