They have to clear cap space to take Rodgers contract, so look for that as well. I wouldn't be surprised if there were some other players traded to make this happen.
They just traded for Chuck Clark, maybe they dump Jordan Whitehead for cap space since Clark is cheaper. They could conceivably redo a number of contracts (Corey Davis, CJ Mosley, Laken Tomlinson, Carl Lawson) to do what GB has done - convert salary to bonus - for cap space.