He can't stay with his man forever, so somebody will have to put the opposing quarterback on his rear or the receiver Johnson is covering will eventually get open.
Later
The Bowles/Rodgers defense seems to be based on the secondary trying to lock down the passing game, while the d-line’s primary focus is containing the run. At least, that’s what it looks like to me. The Jets have had a void at edge rusher for a long time. I’m starting to wonder if this coaching staff even thinks it’s necessary.
I realize these types of players are hard to find, and rarely are they available in FA, but it sure would be nice to have anyone who can generate some pass rush for this D.