Seriously? Who else should they have sent down???
No one expects Stults to go very deep tonight and IF he makes it through 4 or 5 innings he won't be available out of the pen for at least a couple days - they HAD to have another arm for a few days in the event Folty can't get out of the 5th again Sunday. Your choices would've been to send Peterson, Cunningham, Bethancourt, or Ciriaco down or DFA EY (which I'll admit wouldn't have bothered me at all).
Pretty sure they picked the right guy out of the group that could've been sent down.