Theo Riddick underwent surgery on both of his wrists after the season.
Lions re-signed DE Armonty Bryant to a one-year, $855,000 contract.
Lions signed DT Jordan Hill, formerly of the Jaguars.
Paul Worrilow's new deal with the Lions is a one-year, $3-million contract.
Lions signed RG T.J. Lang to a three-year, $28.5 million contract with $19 million guaranteed.
Free agent OG T.J. Lang has narrowed his free agent choices down to the Lions, Packers and Seahawks.
Lions signed WR/PR Keshawn Martin.
Lions signed TE Darren Fells, formerly of the Cardinals, to a one-year, $1.5 million contract.
Lions signed CB D.J. Hayden, formerly of the Raiders, to a one-year contract.
Jordan Schultz of The Huffington Post reports the Seahawks are "working diligently" to sign free agent OG T.J. Lang.
Lions signed DE Cornelius Washington, formerly of the Bears, to a two-year, $6 million contract.
Lions agreed to terms with DT Akeem Spence, formerly of the Bucs, on a three-year, $10.5 million contract.
Free agent OG T.J. Lang will visit the Lions and Seahawks.
Lions extended an original-round tender to restricted free agent OT Cornelius Lucas.
Lions signed ILB Paul Worrilow to a one-year contract.