Honestly, forget Adam Loewen, hes a joke. Seriously, this guy was in my opinion the most overhyped guy in the entire minor league system. He has a poor fast ball and a decent change. Will never make it.
From the previous lists: Aubrey is not forgotten, hes killing the minors last I checked. Kubel is a big time player who will put up phenom-like numbers once he gets over his dreadful injury. I would also like to mention some guys like Dan Meyer, Felix Pie, and Joey Votto.
Unknown guys already in the majors I would like to see in the future: Hennessy (spelling?), Hubel, Maholm, Hardy.
Sleeper: Don't forget how much scouts raved about Jason Dubiois' power. hes a backup in Cleveland now, maybe once he gets his stroke things will change...
Sean Tracey has my apologies, we all know Ozzie Guillen is an idiot. I'm rooting for you!