PITTSFORD, N.Y. — 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."
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.
Kolb wasn't available for comment, but showed frustration by angrily tossing his helmet to the ground before being examined by head trainer Bud Carpenter. After a few minutes, Kolb got up got up on his own and was escorted to the locker room.
Kolb was joining the quarterbacks and receivers in making their way through a tunnel to work out on an adjoining field. He slipped on a mat laid down over the concrete, and immediately began hobbling in pain. Kolb then put his arm around Carpenter's shoulder for support.
It was a freak accident that happened about 50 minutes into practice at Bills training camp in suburban Rochester.
When wet, the mats provide very little traction, especially for players wearing cleats. Shortly after Kolb slipped, several camp volunteers arrived with brooms to sweep away any remaining water from the mats.
Manuel took the extra precaution the next time he went through the tunnel by walking mostly on the concrete.
This is but the latest in a series of setbacks for Kolb, who is entering his seventh NFL season and seeking a fresh start in Buffalo after signing a two-year contract in April.
Selected by Philadelphia in the second round of the 2007 draft, Kolb was sidelined by a concussion in losing the Eagles' starting job to Michael Vick to open the 2009 season. Kolb then spent the past two seasons in Arizona, where he failed to secure the starting job because of an assortment of injuries.
Marrone said it's unfair to label Kolb injury-prone.
"The one thing I do know about Kevin is that he is a tough son of a gun," Marrone said. "He'll get back out there quickly if it's up to him."
In the meantime, Manuel will be getting more practice time with the starters. That's a significant step up after Kolb spent much of the first week of camp getting most of the work with the starters.
Marrone had been increasing Manuel's responsibilities over the past week, with the two quarterbacks nearly evenly splitting snaps by Friday. Marrone liked how Manuel responded after Kolb was hurt by not letting the injury affect him or the offense.
"It was a very smooth transition," Marrone said. "It can affect the team. And I didn't see it affect the two guys behind him, so that's positive."
It's too early to determine whether Kolb's injury will affect the quarterback rotation for the Bills preseason opener at Indianapolis on Aug. 11.
Manuel has shown improvement with each day of practice. On Saturday, he hit Marcus Easley on a deep route, and also showed off his speed in taking off on quarterback sweeps.
|Minnesota - WP: C. Thielbar||7||FINAL|
|NY Yankees - LP: M. Banuelos||3|
|NY Mets||0||Top 4th Inning|
|Indiana||44||2nd Qtr 3:07|
|Washington||38||2nd Qtr 1:52|
|Minnesota||45||2nd Qtr 3:45|
|Memphis||38||2nd Qtr 5:20|
|Denver||7||1st Qtr 5:54|
|Phoenix||12||1st Qtr 5:49|
|LA Lakers||7:30 PM|
|LA Clippers||8:00 PM|
|San Jose||2||2nd Prd|
|Edmonton||0||1st Prd 10:10|
|New Jersey||0||1st Prd 11:51|
|NY Rangers||7:00 PM|
|Northwestern St||68||2nd Half 6:50|
|Stephen F Austin||65|
|Richmond||31||2nd Half 15:28|
|Akron||43||2nd Half 12:26|
|Minnesota||33||2nd Half 12:00|
|Portland State||44||2nd Half 11:50|
|Ark-Little Rock||41||2nd Half|
|Iowa State||43||1st Half 2:34|
|LSU||29||1st Half 1:05|
|Houston||26||1st Half 1:33|
|Seton Hall||31||1st Half 0:35|
|NC State||27||1st Half 1:07|
|Southern Miss||21||1st Half 2:43|
|Coppin State||7:00 PM|
|Sam Houston St||7:30 PM|
|San Diego St|
|Eastern Mich||8:00 PM|
|Northern Colorado||8:00 PM|
|Utah Valley U|
|Ole Miss||8:25 PM|
|Prairie View||8:30 PM|
|Cal Poly||8:30 PM|
|Boise State||10:30 PM|
|New Mexico St|
|Long Beach State|
|(22) Middle Tennessee||64|
|(25) Bowling Green||55|
|New Mexico St||65||FINAL|
|Idaho State||44||2nd Half 2:44|
|Youngstown St||70||2nd Half 0:06|
|Nevada||61||2nd Half 5:30|
|Prairie View||27||1st Half 1:38|
|Missouri State||27||1st Half 0:34|
|Towson||13||1st Half 9:02|
|Coll of Charleston||19|
|Illinois State||8:37 PM|
|Aug 9 - vs. Houston||7 pm||X||27-13|
|Aug 16 - at Buffalo||6 pm||X||20-16|
|Aug 25 - at San Francisco||7 pm||X||34-14|
|Aug 29 - vs. Tennessee||7 pm||X||24-23|
|2013 regular season|
|Sep 8 - at Detroit||Noon||X||34-24|
|Sep 15 - at Chicago||Noon||X||31-30|
|Sep 22 - vs. Cleveland||Noon||X||31-27|
|Sep 29 - vs. Pittsburgh (in London)||Noon||X||34-27|
|Oct 6 - Bye|
|Oct 13 - vs. Carolina||Noon||X||35-10|
|Oct 21 - at. NY Giants||7:40 pm||X||23-7|
|Oct 27 - vs. Green Bay||7:30 pm||X||44-31|
|Nov 3 - at Dallas||Noon||X||27-23|
|Nov 7 - vs. Washington||7:25 pm||X||34-27|
|Nov 17 - at Seattle||3:25 pm||X||41-20|
|Nov. 24 - at Green Bay||Noon||26-26|
|Dec 1 - vs. Chicago||Noon||X||23-20|
|Dec 8 - at Baltimore||Noon||X||29-26|
|Dec 15 - vs. Philadelphia||Noon||X||48-30|
|Dec 22 - at Cincinnati||Noon||X||42-14|
|Dec 29 - vs. Detroit||Noon||X||14-13|