Parker's contract is pretty team friendly. I wouldn't cut him.
In fact, I would love to see what Parker can do going up against #2 corners if the team drafts a true #1.
I mean Parker has made a habit of stepping his game up against #1 corners. He just needs to be at a healthier percentage for more games. The separation stats aren't very good but his body positioning and hands are generally really good and has the ability to come down with the football in 50/50 situations.