Sideline Doctors Face Scrutiny After Hits to a Star Quarterback

Physicians assessing head injuries at N.F.L. games are expected to be able to diagnose concussions. But recent injuries to Tua Tagovailoa raised questions about how effective the doctors can be.

Doctor Who Examined Dolphins’ Tua Tagovailoa Is Dismissed

After Miami Dolphins quarterback Tua Tagovailoa sustained two head injuries in the last week, the players’ union removed a neurologist who was part of the process that allowed him to return to the field.