The WNBA season is months away, but there’s now an opportunity to watch WNBA stars including Breanna Stewart, Napheesa Collier and Brittney Griner.

Unrivaled, a new 3-on-3 women’s basketball league started by WNBA stars Napheesa Collier and Breanna Stewart, will play its inaugural season from January to mid-March. The league consists of ...