There isn't enough trade value for Yorke at the moment. He's a diminished defensive guy who may figure it out offensively. Better to hold onto him.
Jordan is a guy with light tower power who has never done it in game. I don't think he has any trade value.
I don't see the point in trading any of them. I think you probably add Yorke to the 40 man and see if Jordan gets picked in the Rule 5, but I don't think it happens.