Well what about Gamel, Heether, the Hurricane? Lopez isn't that great when there are options in-house. Gamel is probably the better option, but for whatever reason, the Brewers aren't convinced that he's ready. If that's the case, he should be playing everyday in AAA, as you have advocated many times here on this very forum. The other two can't really be counted on- yes, they are potential options, but we don't have much of an idea as to how they'll actually perform. With Lopez, you have a pretty good idea of a baseline.