I think Guzman needs to pitch regularly, not necessarily more and more each game. I don't think getting to 80 or 90 pitches in any one game is nearly as useful as appearing in the game. I'm not talking about some 10 pitch outing with 4 days rest between. Guzman and Hill have each looked good in spurts at the major league level. I say give them the chance to build on those short spurts. If one starts to outperform the other, and looks like he can be extended, do that. If a guy has a no-hitter (or otherwise pitching brilliantly) you don't have to pull him in the 5th. But given the alternatives, I'd callup each and tell them the plan is to get 4 good innings out of each. If one bombs early, the other comes in. If a guy goes 3 giving up 2 runs, with a few too many walks, put the other guy in. I would do my best to keep them from entering in the middle of an inning. And I wouldn't have a problem using Hill between outings in very short stints in the 2nd or 3rd game after the outing. I'd avoid that with Guzman for now.