Wide receiver/kick returner David Reed, who returned to practice Monday but remains on the physically-unable-to-perform list, acknowledged that he'll be limited for a while but said that it's a "blessing" to be back at practice. Reed has three weeks to either be added to the active roster, placed on injured reserve or let go ... The Ravens signed former New England Patriots tight end Alex Silvestro to the practice squad and cut quarterback Dennis Dixon. Silvestro (6-foot-3, 267-pounds), who worked out for the team earlier this week, can also play defensive end, but indicated he will play tight end for Baltimore … Raiders coach Dennis Allen said that he's going to let the week play out before announcing the status of running backs Darren McFadden and Mike Goodson, who are both dealing with high ankle sprains. Neither practiced Wednesday for the Raiders, nor did defensive tackle Richard Seymour (knee/hamstring) and cornerback Shawntae Spencer (foot). … With the exception of the special teams, the Ravens practiced inside Wednesday due to the cold temperature.