New York City F.C., along with the city, Adidas and the U.S. Soccer Foundation, will build 50 junior-sized soccer fields in New York City’s five boroughs over the next five years in a $3 million partnership intended to increase participation in the sport and to promote health and social skills among young people in underserved neighborhoods.

On Tuesday, Mayor Bill de Blasio will announce the location of the first eight fields at Millbrook Playground in the South Bronx, where an all-weather synthetic field will replace part of a dilapidated playground. The 50 fields will be built on an array of underused or rundown city property, including existing parks and school playgrounds. The project will eventually reach an estimated 10,000 children, the team and city officials said.

The four partners will contribute $750,000 apiece to build the fields. The $3 million will also cover maintenance of the fields and after-school activities based on an existing U.S. Soccer Foundation sports and life skills program.

“The city and public have skin in the game, and the private companies have skin in the game, so it’s a way to build bridges throughout our city that is very significant,” said Gabrielle Fialkoff, the director of the Office of Strategic Partnerships, which oversees the Mayor’s Fund to Advance New York City, a nonprofit group that helps children in underserved areas of the city. “When you couple those private resources with the scale and breadth of our city agencies, innovative solutions can happen in a way that public systems can’t do by themselves.”