Sheffield Wednesday snap up Derby's Johnson
The experienced centre-half joins the Owls on a temporary deal until the end of October under the Football League emergency loan ruling.
The under-pressure Owls boss Brian Laws said: "I have been looking to bring in an experienced player to bolster our defence and Michael is the ideal candidate. He has a vast amount of experience at Championship level and will also bring a real vocal presence to the team."
Wednesday are currently bottom of the Championship having failed to register a point so far this season.