I wouldn't jump the gun after one good start people. It may be a good thing for him to go back down and take this positive outing with him to boost his confidence and motivate him to put in the necessary work.
he'll still probably get sent down for Stammen who is more polished but something has clicked on in Detwiler's head this year.
He looks like a different pitcher out there. Finally looking like the guy we drafted with a first round pick a few years ago.