Zimmer tried out for the Bills on Thursday, Aaron Wilson of ProFootballNetwork.com reports.
Zimmer (knee) was placed on injured reserve and will miss the remainder of the season.
Zimmer (foot) is inactive for Sunday's contest against the Dolphins.
Zimmer (foot) is listed as questionable for Sunday's game against the Dolphins.
The Bills promoted Zimmer from their practice squad ahead of Monday's game against the Chiefs, Tom Pelissero of NFL Network reports.
Zimmer was elevated to the Bills' practice squad Saturday, Marcel Louis-Jacques of ESPN.com reports.
Zimmer (undisclosed) signed with the Bills on Sunday, Maddy Glab of the team's official site reports.
Zimmer (undisclosed) has been released by the Browns with a non-football injury, Dan Labbe of Cleveland.com reports.
Zimmer signed with the Browns on Tuesday.
Zimmer joined Atlanta's practice squad on Thursday, Kelsey Conway of the team's official site reports.