Season Description The 2013 Major League Soccer season was the 18th season of Major League Soccer. It was also the 101st season of FIFA-sanctioned soccer in the United States, and the 35th with a national first-division league. The regular season began on March 2 and concluded on October 27. The New York Red Bulls won their first ever Supporters' Shield. The MLS Cup Playoffs began on October 31 and ended on December 7, when Sporting Kansas City won MLS Cup in a penalty shootout over Real Salt Lake. It was the third MLS Cup to be decided on penalties.