4. Rafael Bush
Rafael Bush was not a starter for the Lions but did see the field quite a bit. He was by no means great, but he did provide depth at the safety position. Bush finished fifth on the Lions with 53 tackles, recorded one sack, and was one of four Lions with multiple interceptions (including one returned for a touchdown).
The Lions should be able to re-sign Bush at a fairly cheap price. This would be a good move, as it would provide depth to an already weak secondary.