Former Cincinnati Bengals running back DeDe Dorsey has signed a contract with the Lions, according to a league source. Dorsey sent a Twitter message Tuesday that read: "I am the newest member of ... The Detroit Lions. Motown here I come! I can't wait to get out there and do my thing! Back to the Jungle ... I was a Lindenwood Lion in College and now I am a Detroit Lion in the NFL ... makes sense." The Lions were in the market for a running back after an ACL injury put starter Kevin Smith on injured reserve last season.