Jamal Lewis [1] will reportedly be placed on IR after an analysis of his brain following a severe concussion revealed "brain abnormalities". Lewis has already said that 2009 would be his final season, so it appears that his career is over.
The Browns will use his roster spot on DeDe Dorsey [2], recently of the UFL. Chris Jennings [3] takes over as the starting back, while Jerome Harrison [4] stews on the sideline because...um...he wasn't on the Jets last year. I guess.
Links:
[1] http://www.footballoutsiders.com/player/16379/jamal-lewis
[2] http://www.footballoutsiders.com/player/15745/dede-dorsey
[3] http://www.footballoutsiders.com/player/22854/chris-jennings
[4] http://www.footballoutsiders.com/player/16042/jerome-harrison