San Antonio Spurs star Victor Wembanyama has a concussion. Wembanyama tumbled face-first to the court and exited in the second quarter of Tuesday night's playoff loss to Portland and was placed in the NBA's concussion protocol. Any extended absence by Wembanyama would be a massive blow to San Antonio, which finished with the league’s second-best record behind the versatile 7-foot-4 center from France. Under league guidelines, a player in the concussion protocol must have at least 48 hours of inactivity and recovery and then hit several benchmarks before returning to play.