MLS Next Pro is a men's professional soccer league in the United States and Canada that is affiliated with Major League Soccer. It launched in 2022 with 21 teams and now comprises 27 reserve sides of MLS clubs and two independent clubs. MLS Next Pro is classified as part of the third tier of the United States soccer league system.
As of the 2025–26 season, 27 of the 30 MLS teams held affiliations with an MLS Next Pro team, with only the CF Montréal, D.C. United, and San Diego FC having no such franchise affiliation. From Wikipedia