I don't know man, but it seems to me you haven't been following the minors. Nolin was injured earlier in the season, missed 3 weeks, came back in early June and was injured again recently. He also had a groin injury last year to start the year.
I really don't see much wrong with giving Hendriks a shot, he's been pretty good at AAA and is like 25 so I don't see the issue.
Sanchez has been bad, I don't think it makes much sense to call him up to MLB when he didn't even earn his promotion to AAA.