Riske unlikely to be offered arbitration by Friday deadline
If Kenny is truly appalled by the salaries that free agents are getting, he'd offer Riske arbitration in a heartbeat, knowing full well that Riske would get more than the likely $2.5M he'd earn at arbitration from some other team. The worst that can happen is Riske accepts arbitration, and ends up as the highest paid member of the Sox bullpen to pitch the lowest leverage innings. He'd still be tradeable in June for something of value since seemingly all the mediocre teams in contention are looking for bullpen help at the deadline.
Kenny can't offer Hermanson because of his lingering back injury and the knowledge that he'd also earn at least $2.5M. The Sox already paid him $500K to go away.