The Vikings did not extend tender offers to restricted free agent DLs Otis Grigsby and Jayme Mitchell, making them unrestricted free agents.
Vikings signed DE Otis Grigsby off the Panthers' practice squad.
Panthers released DE Otis Grigsby and promoted DT Gary Gibson from their practice squad.
Panthers waived TE Sean Mulcahy and DE Otis Grigsby.
Dolphins DE Otis Grigsby is emerging as the favorite to replace holdout DE Adewale Ogunleye.