Mike Trout, OF, Angels: Normally we don't spend too much time promoting universally-owned players (though we will discuss them while they slump), but we can't ignore what Trout is doing. He's rocking a .345.402.543 slash line, hitting in all venues and against all sorts of pitching. If you project his 54-game clip to a full season, you get this: 144 runs, 24 homers, 96 RBIs, 63 steals. The Angels have bailed out their season, and it's largely due to what Trout has done; right now, he's the frontrunner for AL MVP.
Jason Heyward, OF, Braves: He's driving the ball again (note the .370.395.716 line in June, with six homers) and the Braves have bought in: Heyward is back to the No. 2 slot in the order, where your best batter should hit and where the roto production flows freely. Heyward's healthy shoulder also shows up on defense, as he's been terrific in right field. Very quietly, Atlanta might have the best outfield in the NL (Martin Prado, Michael Bourn and Heyward).
Alcides Escobar, SS, Royals: He's never going to be the prince of patience, but a .315 average and 12 steals certainly play in our formats, and Escobar's excellent defense will keep him on the field. He should eventually develop a little more power as well; think 8-10 jacks a year. In a down year for middle infielders, you could do a lot worse.
Bryan LaHair, 1BOF, Cubs: He's struggled to hit left-handed pitching all year, and every opposing pitcher has been a hurdle in June (.207.270.397, just three homers, 24 strikeouts). The lofty average and inflated hit rate from April gave roto players a false sense of security: this is a .250-.260 hitter with pop, nothing past that.
Delmon Young, OFDH, Tigers: Why throw him a strike when he'll swing at a ball? Young has just eight free passes this year, against 54 strikeouts, and while a .264 average might not sound like a problem, a .296 OBP and .375 slugging are not playable at an outfield corner (or in the DH spot). The Tigers need to upgrade this position if they fancy themselves legitimate contenders. (And forget about Victor Martinez, at least for 2012: he won't be able to return until mid-September, if at all.)
Brandon Moss, 1B, Athletics: He clubbed a few homers in Colorado two weeks back and people were excited, but the story has quickly collapsed around sea level: Moss has a .171.261.341 slash line since then, with 16 strikeouts in 41 at-bats. Moss is on his fourth MLB organization for a reason - there are plenty of holes in his swing.
Justin Morneau, 1B, Twins: While Target Field isn't a major hurdle for right-handed hitters, it drives a lot of lefties crazy. Consider Morneau, who is a .604 OPS man at home in 2012, compared to a .876 stick on the road. Eight of his ten homers have come away from the home fans. Morneau also needs to take a break against left-handed pitching: they're holding him to a .096 average through 73 at-bats. Don't get tripped up by the name brand here.
Quintin Berry, OF, Tigers: Apparently the Austin Jackson return wasn't enough to push Berry out of relevance - Jim Leyland is letting them play together. Maybe it's an odd idea to have a punchless stick like Berry taking up residence in left field, but a .316 average and .400 OBP are making Leyland look good. And Berry is 12-for-12 on steals, enjoying the green light. Have some fun with it while it lasts.