The defending champions are the New York Cosmos who defeated Indy Eleven in Soccer Bowl 2016.
Eight clubs played in the NASL after provisional sanctioning by the United States Soccer Federation.
Expansion side, San Francisco Deltas joined the league.
The Fort Lauderdale Strikers and Rayo OKC did not return to NASL for the 2017 season.
[3][4] [5][6] * Five home games moved to other venues due to Hurricane Maria.