Browns running back Jamal Lewis will miss Sunday's game with an unspecified head injury, raising the possibility his career is over.
Lewis was listed as out on Cleveland's injury report, as was starting safety Brodney Pool, who sustained at least his fourth known concussion during Sunday's loss in Cincinnati and is out for the season.
The 30-year-old Lewis, who last month said he intended to retire after this season, was not in the locker room during the session open to the media. There were no street clothes in his cubicle and a Browns spokesman did not give a reason for Lewis not practicing.
Browns coach Eric Mangini did not mention Lewis' injury during either of his news conferences this week.
The team has not placed Lewis or Pool on injured reserve.
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