Watching: As the 2013 MLS Season finally kicks off, Greg and Simon review the major storylines of opening weekend. Plus a look back at the USA U-20s' loss to Mexico and a look forward to Houston's CONCACAF Champions' League clash with Santos Laguna. Subscribe to our channel for more soccer content: www.youtube.com - Follow us on Twitter: twitter.com - Like us on Facebook: www.facebook.com - Add us to your circle on Google Plus: plus.google.com About MLS: Headquartered in New York City, Major League Soccer is the top-flight professional soccer league in the United States and Canada. MLS features many stars from the US, Canada, and around the world. Major League Soccer's 18th season features 19 clubs each playing 34 regular-season matches. Those clubs are the Chicago Fire; Chivas USA; Colorado Rapids; Columbus Crew; DC United; FC Dallas; Houston Dynamo; 2012 MLS Cup champion LA Galaxy; New York Red Bulls; New England Revolution; Philadelphia Union; Portland Timbers; Real Salt Lake; San Jose Earthquakes; Seattle Sounders FC; Sporting Kansas City; Toronto FC; Vancouver Whitecaps FC; and, Montreal Impact. For more information about MLS, log on to the league's official website at www.MLSsoccer.com