The thing about his time at AA is, the "struggles" are actually luck-related more than his troubles adjusting to the Eastern League. His BB rate is actually 2% higher than at Ft Myers (13.9% vs. 11.9%), representing a 17% increase in his walk rate at New Britain. Meanwhile, his K rate is only slightly higher than with the Miracle (about 5%). He's slugging at a very, very, torrid clip- a .562 SLG -- if he qualified, that mark would rank him second overall in the EL! His .895 OPS is just a blip behind teammate Josmil Pinto, who at .899 is 3rd in the EL in that category. Furthermore, his isolated power rate of .331 is actually six points higher than with Ft Myers (.325). Putting that in perspective, the qualifying leader in Isolated Power in the Eastern League is Allan Dykstra. His ISO is a full 55 points behind Sano, at .276! The only big discrepancy that stands out is his BABIP of .237 (vs a .397 BABIP with the Miracle). So, he really hasn't been struggling, physically. Mentally, maybe, more a victim of his bad luck at the plate and being in the glare of the spotlight from the Futures Game hype and all the expectations of recently moving up to #3 in the BA rankings. The article you linked to provides the bulk of the concern over Sano on this issue, JB: "There is no time frame for Sano's return, Twins farm director Brad Steil said Thursday. "Just a normal player-development decision," Steil said, declining to characterize the misdeed. "We have discipline for all sorts of things that we do. This is one of them. He's not going to play for a few games."