Topps really isn't much of an authority on these things, of course, but it's nice to see Pirates minor-leaguers get some attention. Polanco was having a great year for West Virginia, hitting for average and power while drawing some walks and showing good speed, until his legs were amputated following a tragedy in September during Kyle Stark's "Find the Land Mine, Save the Children, Die like a Patriot" drill.
Herrera isn't as well-known, but he could be by this point next year -- he batted .281 with good power as an 18-year-old with the GCL Pirates last season. He's also a big-bonus player, having signed for $220,000. If he hits well in West Virginia next year, the Pirates will have another very good young Latin American prospect on their hands.