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I'm a huuuuuge Brian Moran fan.
I think the prospect-rating types have an aversion to role players in general. They think "left-handed set-up guy" or "4th OF who can get on base and swipe a bag and play 3b in a pinch" and that's a negative. But in MLB real-world, Moran and Tenbrink will (or, are at least likely to) have more real value than the 0.5% chance that Greg Halman turns out to be Eric Davis.
Moran doesn't have great stuff, and is "only" a relief specialist, so he drops down the list.