The answer likely lies in his performance this week. Tuesday, Chad Tracy will play an extended spring training game, then down to Tucson to play some AAA games. Depending how things go for him, he is a possibility to be activated for this coming Friday. However the following week, the D'Backs go off visiting AL teams, so a DH will be needed. Unless he falls apart, I can't see them demoting him. My guess is Callaspo goes down. This is a critical time for him upcoming.