Wide receiver Marlon Brown (back), right tackle Rick Wagner (knee), linebacker Albert McClellan (ankle) and cornerback Jimmy Smith (hamstring) did not practice Wednesday. … The Ravens signed defensive back Jermaine Whitehead off the San Francisco 49ers practice squad, and added him to their active roster. The undrafted rookie out of Auburn takes the roster spot of tight end Richard Gordon, who was waived. … The Ravens signed running back Alonzo Harris to their practice squad. Harris, an undrafted rookie out of Louisiana-Lafayette, was cut by the Green Bay Packers earlier this season after he and fellow running back Eddie Lacy missed curfew. … Injured Ravens wide receiver Steve Smith Sr. will be part of CBS' NFL Today pregame show Sunday. … The Tennessee Titans signed former Ravens quarterback Bryn Renner to their practice squad.