NFL notebook: Mishap sidelines Bills' Kolb
Quarterback Kevin Kolb's chances of earning the Buffalo Bills starting job were nearly upended by a wet and slippery rubber mat.
Kolb, who is locked in a competition with rookie first-round pick EJ Manuel, avoided serious injury to his left knee when he slipped and stumbled awkwardly while switching fields between practice drills Saturday.
Coach Doug Marrone said the injury does not appear to be serious. He called it “a bump,'' and listed Kolb ‘'day-by-day.”
Kolb wasn't available for comment but showed frustration by angrily tossing his helmet to the ground before being examined by trainer Bud Carpenter. After a few minutes, Kolb got up on his own and was escorted to the locker room.
Marrone also provided an update on the status of Stevie Johnson, saying the team's No. 1 receiver will miss at least a week with a pulled left hamstring. Johnson was hurt in practice Friday.
Johnson said he felt something pop just as he was pushing off his left leg to make a cut. He expects to be ready for the start of the season.
Mendenhall rests knee
The Arizona Republic reported that Cardinals running back Rashard Mendenhall (knee), who played for the Steelers from 2010-12, didn't practice Saturday because of knee tendinitis and needs a few days of rest.
Starks battles for job
The San Diego Union Tribune reported Chargers offensive tackle King Dunlap appears to have an edge in the competition for starting left tackle job because he has performed better than former Steelers lineman Max Starks during practice.
No talks with Oher
The Baltimore Sun reported the Ravens are not in contract extension talks with offensive tackle Michael Oher, even though he is entering the final year of his contract.
The Ravens had preliminary talks with Oher last year but were not close to an agreement.
Oher, a five-year veteran, struggled during the regular season last year while starting every game at left tackle after Bryant McKinnie was benched. He allowed 10 sacks, the third most in the NFL, and committed nine penalties.
Browns sit Richardson
Browns running back Trent Richardson was held out of practice for the second straight day.
He was kicked in the shin earlier this week, and coach Rob Chudzinski is being cautious with his top offensive player.
Richardson said he should be back at practice Monday.
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