John Sickels released his top A's list today so this appears to be the final consensus for 2015. I'd hoped to include Chris Crawford's Top 15, but he went and got himself hired by Baseball Prospectus, so I'm guessing no list from him.

Positions are where the player is currently; level assignment is a guess. I've also added age in this revision, which is the age the player is considered for the upcoming season based on their June 30/July 1 age.

The Top

1. Franklin Barreto, SS, 19, Low-A Beloit
2. Matt Olson, 1B, 21, Double-A Midland

The Not Quite Top

3. Renato Nunez, 3B, 21, Double-A Midland
4. Matt Chapman, 3B, 22, High-A Stockton
5. Kendall Graveman, SP, 24, Triple-A Nashville
6. Sean Nolin, SP, 25, Triple-A Nashville
7. Dillon Overton, SP, 23, Low-A Beloit
8. Chad Pinder, 2B, 23, Double-A Midland
9. Raul Alcantara, SP, 22, Double-A Midland

The Reliever

10. R.J. Alvarez, RP, 24, MLB

The Great Middle

11. Daniel Gossett, RP, 22, Low-A Beloit
12. Bobby Wahl, RP, 23, High-A Stockton
13. Chris Bassitt, SP, 26, Triple-A Nashville
14. Yairo Munoz, SS, 20, Low-A Beloit
15. Joe Wendle, 2B, 25, Triple-A Nashville
16. Rangel Ravelo, 1B, 23, Triple-A Nashville
17. Brett Graves, RP, 22, Low-A Beloit
18. Max Muncy, 1B, 24, Triple-A Nashville
19. Bruce Maxwell, C, 24, Double-A Midland

The Rest

20. Billy Burns, CF, 25, Triple-A Nashville
21. Mark Canha, 1B/OF, 26, MLB or bust
22. Dustin Driver, RHP, 20, Short-season Vermont
23. Chris Kohler, LHP, 20, Short-season Vermont
24. Jaycob Brugman, LF/RF, 23, Double-A Midland
25. Dylan Covey, RHP, 23, High-A Stockton
26. Heath Fillmyer, RHP, 21, Low-A Beloit
27. Jesus Lopez, SS, 18, Arizona League
28. B.J. Boyd, CF, 21, Low-A Beloit
29. Ryon Healy, 3B, 23, Double-A Midland
30. Aaron Shipman, OF, 23, Double-A Midland
31. Arnold Leon, RHP, 26, Triple-A Nashville

The Not Really Prospects So Much As Guys Who Got Mentioned

32. Tanner Peters, RHP, 24, Double-A Midland
33. Branden Kelliher, RHP, 19, Short-season Vermont?
34. Trace Loehr, SS, 20, Short-season Vermont
35. Pat Venditte, RHP, 30, Triple-A Nashville
36. Tyler Ladendorf, SS, 27, Triple-A Nashville
37. Ryan Doolittle, RHP, 27, Triple-A Nashville
38. Ryan Dull, RHP, 25, Triple-A Nashville
39. Seth Frankoff, RHP, 26, Triple-A Nashville
40. Jake Sanchez, RHP, 25, Double-A Midland
41. Chad Smith, RHP, 25, Triple-A Nashville
42. Branden Cogswell, SS, 22, Low-A Beloit
43. Kyle Finnegan, RHP, 23, High-A Stockton
44. Iolana Akau, C, 19, Arizona League
45. Chris Jensen, RHP, 24, Triple-A Nashville
46. Sandber Pimentel, 1B, 20, Short-season Vermont
47. Jordan Schwartz, RHP, 23, Low-A Beloit
48. Jose Chavez, C, 19, Low-A Beloit
49. Seong-Min Kim, C, 22, Low-A Beloit

New entries to the list are: Doolittle, Dull, Frankoff, Sanchez, and Smith.

Rank changes among the players who matter include Kendall Graveman and Sean Nolin leapfrogging Dillon Overton, which would probably be my preference too. Were I to have enough knowledge to make one of these lists, I suspect I'd be a lot higher than the crowd/average on safe, close-to-the-majors prospects and a lot lower on boom/bust guys in A-ball, injury cases with upside, and so on. Graveman and Nolin's back-end starter profile that's ready for the majors right now thus strikes me as worthy of ranking on top of Overton's "could be really good assuming he makes it at all!" steez.

R.J. Alvarez leaps all the way up to the top ten, and I think he belongs in his own one-man category as a reliever-only sort of player, but one who some see as having closer upside and others think is a middle reliever due to control problems. Valuing relievers is a difficult enough proposition when we know exactly what they did -- putting a future value on a young "prospect" reliever is difficult enough to explain relatively wide divergence in his rankings.

Prior versions of the list

February 25, 2015
February 24, 2015
February 2, 2015
January 31, 2015