Gallardo has improved at each level, which is what you want to see. Note the steady decline in his ERAs as he has moved up the ladder. Note his strong K/IP and H/IP ratios, and the low home run rate. His main flaw last season was occasionally spotty control, but that hasn't been much of an issue this year. His platoon splits are very slight (.635 OPS for lefty hitters, .501 for righty hitters) and he seems to do a good job bearing down with runners in scoring position (just .373 opposition OPS RISP for Huntsville so far). Overall, there are no flaws in his numbers. Add in the fact that he is 20 years old and pitching great in Double-A, and you have yourself a top prospect.