Of those five, I'd take a flyer on Cabrera if you need to use up innings (he has the potential; we'll see what he does with it); if innings are tight, go with Stechschulte and hope for a few wins. His k-bb value is pretty weak for a middle reliever, however.
21 team NL only? Now that's deep!
In a league like that, any of those guys (except for Wright) will have value.