Signed wide receiver Jarrett Boykin to a one-year contract; claimed offensive tackle Jonathan Martin off waivers from the San Francisco 49ers.

Signed safety Kurt Coleman to a two-year contract.

Re-signed tight end Ed Dickson to a three-year contract.

Re-signed defensive tackle Dwan Edwards to a two-year contract; released running back DeAngelo Williams.

Signed wide receiver Ted Ginn to a two-year contract; re- signed running back Fozzy Whittaker to a two-year contract; re-signed quarterback Joe Webb, wide receiver Brenton Bersin, center Brian Folkerts and linebacker Ben Jacobs to one-year contracts.

Signed offensive tackle Michael Oher.

Agreed to terms with tight end Greg Olsen on a three-year contract extension through the 2018 season.

Signed guard Chris Scott to a one-year contract; released safety Thomas DeCoud.

Promoted Steve Wilks to assistant head coach.

Named Bruce DeHaven special teams coordinator and Richard Rodgers assistant defensive backs coach.

Announced the retirement of senior offensive assistant John Ramsdell.