You'd be wasting his value. Your best reliever should pitch in the tighest of spots. That is mostly in the 6th, 7th, or 8th, when the starting pitcher or middle reliever gets in trouble and you need to get through the heart of the order. The closer starts almost all his innings with nobody on, so you can afford to give up a runner. When a guy comes in during the 8th with men on and nobody out, you need your stud reliever. I would rather have dempster, whose K/9 and HR/9 are high enough/low enough to be able to handle the 9th, where he probably won't have runners on already unless Eyre came in and screwed up, again, then waste Marmol by moving him away from where he is most needed, coming in in a pinch and getting outs. Besides, for all you praise for Carlos, their BB/9 are very simular: 4.67 (RD) vs. 4.42 (CM), however Carlos does have a much better K/BB rate. Carlos has going for him the fact that he is virtually unhittable. When you have a sub .200 BAA, you can get away with walking a few more people. Edit: just looked up stats and Dempsters allowing a .198 BAA. Of course, he has been nowhere near that good historically. Still would rather have Carlos are the goto man in the pen for when we need him, not saving him for the ninth when the game may be in hand or out of reach. Maybe have him try for the 1 run saves if he is available, but don't restrict him to the ninth.