I don’t believe Hendriks has much trade value because his contract is so big. He’s probably movable but I can’t imagine a big return for him. About the only GM who pays a big price in talent for expensive closers in a trade is, ironically, Rick Hahn, and the White Sox don’t have him to trade with.
Graveman on the other hand, if he continues pitching this well, could be much more interesting and actually give a solid return.