Cleaning up a few Lions roster issues

Detroit's acquisition of defensive tackle Corey Williams made veteran Grady Jackson expendable, and the Lions announced Jackson's release Friday afternoon.

The Lions have a much younger, healthier and cheaper version of Jackson already on their roster in Sammie Lee Hill. Williams and Hill could share time with either Ndamukong Suh or Gerald McCoy if the Lions make one of the latter two players the No. 2 overall pick in the draft.

Meanwhile, the Lions have also re-signed two of their unrestricted free agents Friday. Offensive lineman Jon Jansen and linebacker Vinny Ciurciu each agreed to one-year extensions.