Baseball America has their top 20 prospect list for the Pacific Coast League out.
Only one Ranger makes the cut on their top 20 list -- Jurickson Profar, who is ranked #2 overall, right behind Oscar Taveras and right ahead of George Springer.
Interestingly, BA says PCL managers/scouts thought Profar took a step backwards in 2013 -- and presumably, that's based on his time in Round Rock, rather than his time in the majors. Profar was the consensus #1 prospect in baseball coming into this season, so him ranking behind Taveras (who is, to be fair, an elite prospect himself) indicates a drop in status.