What happened: The league marked Stephon Castle turning 22 years old on Sunday. The milestone arrived as the guard opened his third professional campaign in San Antonio's starting backcourt.

Why it matters: Castle stepped into the 2026-27 regular season holding a starting role alongside Devin Vassell and De'Aaron Fox. His two-way development remains central to San Antonio's rotational plans as the schedule gets underway.

What to watch: San Antonio continues its early-season regular-season slate through November.