Reed (concussion) has not yet passed his baseline test and is not cleared to play, while Zbikowski (back) has a bulging disc and also will not be able to suit up against Cleveland.
Eight Ravens are listed as probable: linebacker Brendon Ayanbadejo (knee), center Matt Birk (knee), wide receiver Derrick Mason (ankle), guard/tackle Tony Moll (illness), safety Haruki Nakamura (illness), linebacker Jason Phillips (illness), defensive end Cory Redding (elbow) and wide receiver Marcus Smith (shoulder).
Redding did not practice today, while Ayanbadejo, Mason and Nakamura were all upgraded to full participation.
For the Browns, reserve tight end Robert Royal (shoulder) is listed as doubtful.
Five Browns starters are probable: defensive back Sheldon Brown (shoulder), running back Peyton Hillis (knee), quarterback Colt McCoy (illness), and offensive linemen John St. Clair (ankle) and Floyd Womack (knee).
Pro Bowl kick returner Josh Cribbs (foot) also is listed as probable.