On the whole, it looks like a solid team. My biggest issue: I'm not sure why you bothered with Harper or Trout at this point in a one-and-done league. If you were in a keeper league, they'd be no-brainers. Since you're not, I hope you can package one (or both) for someone who will help you WAY more this year.
I like the sticks overall, but agree with the above poster - Young and Hart will definitely hurt you, and Crawford isn't exactly a sure thing. I feel like Young has the least to offer you, although any upgrade would be welcome.
As of 8/4/13
C:Napoli 1B:Goldshmidt 2B:Kinsler, Gyorko SS:Tulo, Profar 3B:Longoria, Machado, Middlebrooks OF:Harper, J. Upton, AGon, R. Davis, Venable SP:Scherzer, Minor, Ryu, E.Santana, Beachy, Samardzja, J.Johnson (DL), T.Ross RP:Perez, Rodney, Farquar