It should be interesting to see Christensen in Tri-City this year.  

Also, another name is Sheng-An Kuo, a highly touted righty from Asia the Rockies signed. I'd rank Martinez and Ferrer probably 5 and 6. Reports are very good on Ferrer. Martinez was a highly touted International signee.

As for the list, it isn't sexy, but I tried to stay within the guidelines for players that won't amount to slightly more than a cup of coffee type.  You aren't going to find any Chris Nelson's or Hector Gomez's here since their upside is too tantalizing, but I also tried not to take the easy way out.  So, here's my shot at this:

10.  Jordan Czarniecki- It was recently posted that a BA staffer preferred him to Seth Smith.  Czarniecki can play every outfield position, but he's getting up there in age and hasn't established that he can consistently hit for contact despite a smooth line drive speed.  May have bat speed issues.  Fourth outfielder is a difficult role to break into as well.
9.  Alvin Colina- My contention here is that he may not hit enough in a brief cameo to get the organization to trust him, and at his age, he isn't due many chances.  He has some nice secondary skills but if bat speed keeps him from hitting above .240, he doesn't have enough to keep him around.
8.  Ching Lung Lo- His mechanics are a mess and he's running out of time.  He likely won't be worth protecting when the time comes, and even then he hasn't demonstrated enough for another team to take a chance on.  Lo's prospectdom has been tied largely to hype over performance, but he should not still be on this slow a pace.
7.  Alberto Arias- He's already received his cameo, and a few posters have expressed satisfaction in his potential, so he fits the requirements.  Short soft tossing relievers aren't hard to find, and he's likely to be passed by more talented prospects and free agent/trade acquisitions.  Struggles of young pen don't speak well to him making a meaningful repeat appearance with this organization.
6.  Sean Barker- It's rather rare for a prospect to appear on the scene at age 26, and it's really no coincidence that Barker's rise has come with the altitude and hitting environments of the PCL.  His BABIP is currently .500, and it may not drop far in the Springs, but he was a dud in Tulsa two years ago, and I wouldn't expect big things in Colorado upon the call-up he'll undoubtedly receive.  30% K rates may lead to very little contact in the big leagues.
5.  Daniel Carte- He's made some noise with his hot start, but it is all BABIP driven (.447) and his 28% K rate is well above accepted levels for a prospect at his level without Brandon Wood's power.  I'll give his low BB rate a mulligan only because it was around 9% last year, and when 45% of the balls he makes contact with are going for hits, it's hard to fault him for not wanting to walk right now.  I'll take the suggestions of two mediocre years over his recent hot start.  Even now he still needs more pop to stick in an outfield corner.
4.  Michael Paulk- Rates this high only because of the love he receives here rather than elsewhere.  I'm not going to tell you guys that he's having a "fluke" year, or that he's a non-prospect, because he needs a call up to prove one side or the other.  There are other notes of concern for his prospectdom, though.  For one, first base prospects must demonstrate power in spades, or they just won't crack the big leagues.  Currently, Paulk's ISO is under .200, despite his home park and left-handedness.  I don't buy the argument that he's trying not to play to the park's strengths, because if he is he's foolish.  Paulk is seen on the periphery of Rockies' prospects, and using McCormick to blast 25 homers is a good way to put yourself on the map, if for not this organization others.  Second, he's about to be 23 and repeating SAL, so he should be outperforming the competition (though not this much, that's where the .445 BABIP comes in).  I like the K and BB rates, but the power must increase and the contact must stick if he's to climb the difficult ladder of minor league first baseman.
3.  Matt Miller- Here's a good lesson for those wanting to see a McCormick creation.  Miller has yet to show the same pop since leaving the cozy confines.  Miller is only adequate defensively, and is already behind Spilborghs, Smith, and Barker on the organizational food chain.  It just takes one of those three to make it as a fourth outfielder to put him on notice.  He hasn't had a high enough ISO to start in a corner since leaving Low A ball.
2.  Eric Young Jr.- You could just as easily put Wimberly here, but I thought Young would make the list controversial.  Speed is an exciting tool, but in the grand scheme of things, these two may have only two playable major league tools, which lessens the impact factor, and without pop, they will have to take the "beat out infield hits" route, which doesn't often afford several chances.  In 145 AB's in High A, Young isn't hitting for any pop, isn't walking enough for his skill set, and is striking out a little too much.  Sometimes, patience just disappears for slap hitters when the jump levels, as more experienced pitchers stop nibbling and start pounding the zone.  Not only must Young deal with Wimberly, who has the same tools but is currently a level ahead, but Gomez, Herrera, and Nelson all could handle second and have more rounded tool sets.  
1.  Shane Lindsay-  This has nothing to do with stuff or performance.  Every team has natural attrition with their prospects, and it's starting to look like Lindsay's labrum will make him the pitcher that never was.  As much as we'd like to see him be the stud he can be, injuries have other plans.  I think it's a strong possibility that Lindsay may never be healthy enough to carry his original stuff to the bigs.
   

My contention with Mattheus is he's just been too hittable in his minor league career.  The K and BB rates are solid, but he's also had a solid strand rate, so all the blame can't be placed on the bullpen for last year or this year.  Sometimes with BABIP, prospects are unlucky (or lucky), but if they begin to trend (especially in pitchers) then there's a larger issue.  Mattheus' BABIP was very high last year, and is looking pretty high again this year.  

Stuff-wise, he's prospect worthy from what I understand, but for the back end of the rotation.  It's harder for players like this to crack the majors than pitchers like Clarke or Morillo.  I wouldn't consider him a non-prospect like I do Lo, it's just that I believe Clarke and Morillo are higher on the food chain, that's all.

I think that Paulk's lack of home runs at McCormick is something that might be over-analyzed a bit.