The Browns didn't provide any specifics on Lewis' injury, but they listed him as "did not participate in practice," along with guards Rex Hadnot (knee) and Floyd Womack (ankle).
Lewis was listed as probable on the injury report with a neck injury last week after suffering a stinger in the season-opening loss to the Minnesota Vikings.
The Browns (0-2) badly need Lewis this week. They will face the Ravens' top-ranked run defense, which is yielding just 41 yards per game. If Lewis can't go, rookie James Davis and Jerome Harrison likely will share playing time in Cleveland's backfield.
Copyright 2009 by The Associated Press