I think Wentz may get a longer look seeing he has had some--though very isolated--success at the major league level. The fact that Chavez is on the roster is a real indictment on the Braves.
I'm with Hudson on Waldrep, but in what looks like it's shaping up to be a lost season, I don't know why they would bring Ritchie up. Deester may correct me seeing that he has watched Ritchie in person, but I get the impression that at this point Ritchie is a pitchability guy who needs to add a bit of strength and maybe an MPH or two to his fastball.