It is possible that they think they found a stud, but I really doubt that they would jump him over all the other SS's in the system right now. My guess is there was a need in Iowa for a middle infielder (I've been bad about keeping up with Iowa with the end of the school year so I don't know if Valbuena, Tolbert, etc. are banged up or something), and instead of moving guys that they want to develop in their leagues they jumped Amaya up there. This way everyone could stay and get their playing time at appropriate level while a guy that was just in XST gets a taste of AAA. I think if any middle infielder was going to get the jump to AAA would be Baez, but again I think they don't want to mess with the development of Baez, Lake, etc. for what I am guessing is a short term need in Iowa.