The Ravens were unable to do much on Thursday morning, as the teams practice wasEdwards halted by about an hour when a downpour hit, stopping practice about 9:15 a.m.  The afternoon went alot better, and the two-plus hour session was complete with the work that the team missed in the morning session.  As far as the injury front was concerned, one name that was added was O-lineman Steve Edwards, who suffered a knee injury.  The four-year vet from Central Florida had his knee examined, and the team will take a look at his future with the ball club.  Antwan Barnes went down on Wednesday with a right ankle injury and was carted off the field, but was able to walk around the field on Thursday, but didn’t do any one-on-one drills.  Jonathan Ogden (toe), Mike Smith (shoulder) and Dan Cody (knee) are still on the physically unable to perform list.