This list is admittedly somewhat subjective, but I thought I'd take a stab at providing a general guide for those less familiar with Reds prospects of the relative trade value ranking of our prospects with the trade deadline (and therefore likelihood of a trade involving one or more of these prospects) approaching.
Please keep in mind this is NOT a ranking of Reds Top Prospects, as there are several top prospects who don't appear on this list because they are not eligible to be traded, and there is some differences between how I would rank top prospects vs. how I would rank prospects' trade value (ie relievers closer to the majors would generally rank lower in the former and higher in the latter). Please use the groupings/gradings as more of a guide than the actual rankings, as there is some subjectivity applied. Without further ado:
GRADE A
1. Billy Hamilton SS in AA
GRADE B+
2. Robert Stephenson RHP in A
3. Tony Cingrani LHP in AA
(tie) Daniel Corcino RHP in AA
GRADE B/B-
5. Kyle Lotzkar RHP in AA
6. DiDi Gregorius SS in AAA
7. Henry Rodriguez 3B in AAA
8. Yorman Rodriguez OF in A
9. JJ Hoover RHP in AAA
10. Donnie Joseph LHP in AAA
GRADE C
11. Tucker Barnhart C in AA
12. David Vidal 3B in AA
13. Donald Lutz OF in AA
14. Ryan LaMarre OF in AA
15. JC Sulbaran RHP in AA
16. Pedro Diaz RHP in R
17. Ismael Guillon LHP in R
18. Drew Cisco RHP in R
19. Amir Garrett LHP in R
20. Sal Romano LHP in R
21. Kyle Waldrop OF in A
22. Neftali Soto 1B in AAA
23. Bryson Smith OF in AA
24. Ryan Wright 2B in A
25. Gabriel Rosa 3B in R
Basically anyone else could likely qualify as a throw-in/PTBNL in a potential deal. As mentioned earlier 2012 draftees are not eligible to be traded and therefore do not appear on this list.