Ravens starting cornerback Lardarius Webb suffered a thigh injury today against the Buffalo Bills and his return is questionable, according to the team.
Webb was running on the sideline, testing it out and didn't seem particularly hampered.
Corey Graham has replaced Webb at cornerback.
Graham, who was replaced in the starting lineup by Jimmy Smith after a 49-27 loss to the Denver Broncos in the season-opener, was beaten for a 42-yard touchdown pass in the second quarter by rookie wide receiver Robert Woods.
Webb is the Ravens' top cornerback and was signed last year to a $50 million contract extension.