Why World Cup can be game-changer for ambitious MLS

Lionel Messi was one of 45 MLS players to feature at the World Cup [Getty Images]"Thanks world, We'll take it from here."That's the message from Lionel Messi, Son Heung-min, David Beckham and dozens of Major League Soccer players in an advertising campaign urging new football fans created by the World Cup to check out MLS.The slick film showcases World Cup stars who play in the US top flight, inviting fans to join them as the regular season resumes. The league is even offering free tickets to ne