The Sox have carried guys like Groome on the 40 man who had no shot of helping BOS that season. I'm kind of surprised they didn't select Wikelman unless they think he's trending away from being a starter, aren't convinced in his late season turnaround or just think it's going to take him too long to reach BOS.
Wallace COULD make the bigs, but his ceiling is middle relief. You can't really protect every guy who profiles as a middle reliever. If that were the case, you wouldn't have enough room for incoming FA's.
I'd be surprised if more than 2 Sox get selected. It's much more likely that only one guy is selected. If anything, Ward and Wikelman are selected and one gets returned in season.
Sox could also select old friend Aldo Ramirez who the Cubs left off their 40 man roster.