Rosario is not playing over his head. Regard his 2014 season (other than the AFL part) as a waste. Surprised a bit by the HR power, but he is 23, so he is developing. He will not walk, and he strikes out more than usually, but he does not get many fastballs, like he did in the minors. He has been a .300 hitter most of his career and he will do that in the majors. Lots like Ben Revere type of a player, with less speed and glove but more pop and better arm. Somewhat like a Denard Span with better contact tool and similar concentration lapses. You are looking at a .300/.350/.480 type of player with 15 HR and 20+ SB in a good full season. Remember, he was a perennial Twins' top 10 prospect and BP had him as high as 60 in baseball before 2014. His stock dropped by the move to the OF (that slash line above makes a good OF, but an All-Star second baseman) and by the suspension. After 2013, I had ranked him as the Twins' 4th best prospect (behind Sano, Buxton and Meyer.) As far as that OF goes (Rosario, Buxton, Hicks,) I see 2 issues: One is obvious: Buxton may or may not arrive. Has good size holes in his hitting game, and he needs to fix them. The other is not that obvious: This team sorely needs some LH power. Corner infield positions are pretty much taken for the foreseeable future. So opportunities for LH power (and I am talking 30 HR power) are at DH and corner OF. In the organization only Arcia and Vargas have such power (Kepler has doubles power;) on the other hand you have Sano, Mauer and Plouffe in some combination of 3B, 1B and DH. Lefties have a .661 OPS against RHPs and .658 OPS against LHPs. This is a problem that has to be fixed and I don't see many places other than the OF to fix it...