New York City Football Club soccer head coach Jason Kreis, answers questions on the field at New York's Yankee Stadium, Monday, April 21, 2014. The Yankees announced that Yankee Stadium will serve as the Club's first home and begin play on March 2015. (AP Photo/Richard Drew)
New York City Football Club soccer head coach Jason Kreis, left, is joined by Director of Football Operations Claudio Reyna, center, and Chief Business Officer Tim Pernetti, as he answers questions at a New York City FC news conference, at New York's Yankee Stadium, Monday, April 21, 2014. The Yankees announced that Yankee Stadium will serve as the Club's first home and begin play on March 2015. (AP Photo/Richard Drew)
New York City Football Club soccer Chief Business Officer Tim Pernetti, head coach Jason Kreis, Director of Football Operations Claudio Reyna, retired New York Yankees pitcher Mariano Rivera, Yankees President Randy Levine, and Yankees COO Lonn Trost, left to right, pose for photos on the field at New York's Yankee Stadium, Monday, April 21, 2014. The Yankees announced that Yankee Stadium will serve as the Club's first home and begin play on March 2015. (AP Photo/Richard Drew)
Retired New York Yankees pitcher Mariano Rivera, right, addresses a New York City Football Club news conference at New York's Yankee Stadium, Monday, April 21, 2014. Seated, from left, are head coach Jason Kreis, Director of Football Operations Claudio Reyna, and Chief Business Officer Tim Pernetti. The Yankees announced that Yankee Stadium will serve as the Club's first home and begin play on March 2015. (AP Photo/Richard Drew)