Yes it's very small. Not a zero chance, but small.
The only way one is claimed is if you find a team with poor defensive depth that is also lacking in prospects pushing for a spot. Maybe they want to take a gamble. Maybe someone in their front office was here when we selected Jones for example, and they are still very high on him. That's really the primary plausible scenario. You claim him, give him a shot, and if he doesn't work you may be lose him to waivers again.
For the Rangers they may have some additional risk since their defense is mainly set and you have several guys Fighting for a spot. Teams know our situation and will definitely be watching Jones, Emberson, you could even throw in someone like Mac Hollowell.
In any event, as
@cwede said, it's really unlikely any of those guys I mentioned are claimed. Maybe Jones has the highest shot because of the perceived upside and everyone needs PMD, but otherwise, they should be fairly safe.