What team won the MLS Supporters' Shield in 2013 and 2015?

The New York Red Bulls won the MLS Supporters’ Shield in both 2013 and 2015. The Supporters’ Shield is awarded to the Major League Soccer team with the best regular-season record, rather than to the team that wins the postseason MLS Cup.

The 2013 title was the club’s first Supporters’ Shield. New York finished atop the league standings with 59 points, ahead of Sporting Kansas City, although Sporting Kansas City went on to win the MLS Cup playoffs. That distinction illustrates the difference between regular-season success and postseason victory in MLS.

In 2015, the Red Bulls won the Shield again with 60 points. They were led in part by forward Bradley Wright-Phillips, who scored 18 league goals, while Jesse Marsch coached the team in his first season in charge. New York again reached the playoffs but did not win the MLS Cup.

The club later captured a third Shield in 2018. Thus, the shared answer to the question is the New York Red Bulls, not Sporting Kansas City or another MLS champion from those seasons.