Not only did Jabari not crack the rotation in Chicago, he was removed. Who was the last player released by a team that ended up being an all-star that was not a planned move? I've seen better players do this kind of thing as part of the plan to sign someone else then be picked back up, but I can't think of a single player released like this who turned into anything.
Just say no to Jabari.
The only way we should consider signing Parker would be picking him up off waivers for cheap. Maybe a straight swap with Exum. Otherwise giving up any assets at all for him is beyond foolish.