Detroit Lions right tackle Penei Sewell is in concussion protocol and will miss his second straight practice Sunday.
Lions coach Dan Campbell said Sewell won't return until at least Wednesday under the NFL's concussion guidelines. Players must be symptom-free and cleared by an independent neurologist before they can return to practice.
"But he's doing good," Campbell said before practice Sunday. "He was good yesterday, so moving right along. Just trying to be safe."
Sewell took part in the Lions' first padded practice of summer Friday and met with reporters after the workout, but did not practice Saturday.