Ravens lose best cornerback Webb

BALTIMORE -- Lardarius Webb, the Ravens' top cornerback, had to be helped off the field after he injured his left knee late in the first quarter. The team announced Webb is questionable to return.

In covering Dez Bryant, Webb knocked knees with the Cowboys' physical wide receiver and dropped to the ground holding his leg. Webb couldn't put any weight on the knee and had his arms draped over trainers to walk off the field with 2:23 remaining in the first quarter.

Webb has one interception this season and leads Baltimore with six passes defensed. Jimmy Smith, a former first-round pick, has replaced Webb in the starting lineup.