You might recall the Panthers won those last four games in which Dockery played on the outside. Coincidence? Maybe but this piece really made me think this kid might actually be an answer at CB for the Panthers:

James Dockery Is Happy To Be With the Carolina Panthers
In 2011, Dockery was the Browns’ star of training camp and his play was not going unnoticed. After a strong preseason, rookie head coach at the time Pat Shurmur and his staff felt Dockery earned a spot and signed him for the season. However, for whatever reason, the former Beaver only dressed and played in 12 games. The 25-year-old finished the season with five special teams tackles. Dockery played mostly special teams and was inactive for the final six games. Still, it seemed like the promising young corner was going to be given a shot in the 2012 campaign.

If the Browns have a team strength it's at CB so I can see how a guy like Dockery might not stick. Interesting that they didn't put him on the practice squad though I'm not sure he was eligible at that point.