The Lions want to bring in competition for C Travis Swanson.
Lions C Travis Swanson underwent shoulder surgery last week.
Lions placed C Travis Swanson (shoulder) on injured reserve.
Second-year C Travis Swanson has a firm grip on the Lions' starting center job.
Lions offensive line coach Jeremiah Washburn wouldn't commit to Travis Swanson starting at center.
Lions OC Joe Lombardi expects Travis Swanson to start at center this season.
Lions signed third-round C Travis Swanson to a four-year contract.
Lions selected Arkansas C Travis Swanson with the No. 76 overall pick in the 2014 draft.