Browns rookie defensive end Myles Garrett has been ruled out for Sunday's game against the Vikings in London.
Garrett, who was placed in the league's concussion protocol Tuesday, will not travel with the team. The Browns are set to depart for London late Thursday and will go through a walk-through Friday afternoon at the fields near their hotel.
Garrett, who missed the first four games of the season with a high ankle sprain, leads the Browns with four sacks in three games.
"It is concussion protocol, and some guys are going to come back quicker than others and some guys stay awhile as we know," Browns coach Hue Jackson said Wednesday. "We hope it is the [former] and we will kind of go from there."