Hechevarria, Beckham or Martin Perez? (prospects)

[Ernie.Whitt.]

Does anyone have an opinion on which of these 3 prospects I should keep? I'm not sure Hechevarria will be an offensive force, Beckham was drafted 1st overall but has struggled since... and Perez Perez had a mediocre season last year (though he was only 19)
Thanks for your thoughts...

[HOOTIE]

Perez still has quite a arm and ceiling.

[MaudDib]

Perez still has quite a arm and ceiling.

Perez is the only one that has much value at the moment and the foreseeable future.

[kab21]

It is Perez by a mile. This really isn't that close since the other two aren't even top 100 fantasy prospects imo. Hechevarria might be close in real life since defense counts but he's pretty weak as a hitter.