Ah, the wonders of recency bias and small sample size. I certainly like Duran in the bullpen. This season would look very different without him. The demons (walks and home runs) have again beset Pagan. Someone with those demons shouldn't be pitching in the highest leverage situations.
The Twins currently have an eight-man bullpen. They also have three relievers on the IL (Smith, Megill and Coulombe) and one (Cano) on option at St. Paul. On top of that, they have three, maybe four pitchers on the 60-day IL who could be activated within the season. Injuries will happen, but that is a lot of players to fit into a bullpen and if more are added by trade, many will be jettisoned. Of all the options within the organization, I'm hard pressed to see anyone who could be trusted to get crucial outs at the end of a game in October.